Answer:
( ( 3(8) ) /2 ) - 7 = 5
Step-by-step explanation:
Eliminate the denominator by reducing the fraction by 2
3(4) - 7
Solve:
12 - 7
= 5
Answer:
5
Step-by-step explanation:
Given
[tex]\frac{3x}{2}[/tex] - 7
To evaluate substitute x = 8 into the expression
[tex]\frac{3(8)}{2}[/tex] - 7 = [tex]\frac{24}{2}[/tex] - 7 = 12 - 7 = 5
Suppose you roll a 6-faced die 90 times. About how many times would you expect to get a 5?
Answer: 15
Step-by-step explanation: because there are 6 sides. 1/6*90=15
Hoped this helped!
When rolling a fair six-sided die 90 times, the expected number of times you would roll a 5 is about 15, calculated by multiplying the probability of rolling a 5 (1/6) by the number of rolls (90).
If you roll a fair six-sided die 90 times, you would expect each number to appear with equal probability because the die is fair. For each individual roll, the probability of getting a 5 is 1 in 6, as there are six possible outcomes. To find the expected number of times you would get a 5 in 90 rolls, you simply multiply the probability of rolling a 5 by the total number of rolls.
Expected number of fives = Probability of rolling a 5 × Total number of rolls
= (1/6) × 90
= 15
Therefore, you would expect to roll a 5 approximately 15 times out of 90 rolls.
Factor completely and find the roots of the following. X^2+12x+27=0
Answer:
x = - 9, x = - 3
Step-by-step explanation:
Given
x² + 12x + 27 = 0
To factorise the quadratic
Consider the factors of the constant term (+ 27) which sum to give the coefficient of the x- term (+ 12)
The factors are + 9 and + 3, since
9 × 3 = 27 and 9 + 3 = 12, hence
(x + 9)(x + 3) = 0
Equate each factor to zero and solve for x
x + 9 = 0 ⇒ x = - 9
x + 3 = 0 ⇒ x = - 3
Nancy found that x = 1 is one solution to the quadratic equation (x + 2)2 = a. What is the value of a?
Answer:
9
Step-by-step explanation: (PLZ GIVE ME BRAINLIEST!!!! :))i did this question before
Answer:
The value of x is 9.
Step-by-step explanation:
Given equation,
[tex](x+2)^2=a[/tex]
If x = 1 is the solution of this equation,
Then it will satisfy the equation,
[tex]\implies (1+2)^2=a[/tex]
[tex]\implies (3)^2=a[/tex]
[tex]\implies a = 9[/tex]
Hence, the value of x is 9 if x = 1 is the solution of the given equation.
Graph the system of equations. f(x)=−x^2+2x+4g(x)=−x+4 Which statements are true about the solutions to the system of equations? Select each correct answer.
An ordered pair that is the solution to the system of equations lies in Quadrant I .
An ordered pair that is the solution to the system of equations lies in Quadrant III .
An ordered pair that is the solution to the system of equations lies on the y-axis.
The x-coordinate of a solution to the system of equation is 3.
The y-coordinate of a solution to the system of equations is 4.
The y-coordinate of a solution to the system of equations is 0.
ANSWER
An ordered pair that is the solution to the system of equations lies on the y-axis.
The y-coordinate of a solution to the system of equations is 4.
EXPLANATION
The given system has equations:
[tex]y = {x}^{2} + 2x + 4[/tex]
[tex]y = - x + 4[/tex]
We equate both equations to get:
[tex] {x}^{2} + 2x + 4 = - x + 4[/tex]
This implies that,
[tex] {x}^{2} + 2x + x + 4 - 4 = 0[/tex]
[tex] {x}^{2} + 3x = 0[/tex]
[tex]x(x + 3) = 0[/tex]
[tex]x = 0 \: or \: x = - 3[/tex]
When x=0, y=-(0)+4=4
When x=-3, y=-(-3)+4=7
The solutions are: (0,4) and (-3,7)
The true statements about the system of equations are:
(a) An ordered pair that is the solution to the system of equations lies in Quadrant I .(c) An ordered pair that is the solution to the system of equations lies on the y-axis.(d) The x-coordinate of a solution to the system of equation is 3.(e) The y-coordinate of a solution to the system of equations is 4.The system of equations is given as:
f(x)=−x^2+2x+4
g(x)=−x+4
From the graph of the system of equations (see attachment), we have the following point of intersections
(x,y) = (0,4) and (3,1)
So, the true statements about the system of equations are:
(a), (c), (d) and (e)
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Find the value of x to the nearest tenth.
Answer:
x = 8.9 (nearest tenth)
Step-by-step explanation:
6^2 - 4^2 = 36 - 16 = 20
So
x = 2 * (√20)
x = 2 * 4.47
x = 8.94
Answer:
The value of x = 4√5
Step-by-step explanation:
Points to remember
For a right angled triangle
Hypotenuse² = Base² + Height²
To find the value of x
From the figure we can see a right angled triangle with,
hypotenuse = 6 and height = 4
Value of x = 2 * base
we have, Hypotenuse² = + Height²
Base² = Hypotenuse² - Height²
= 6² - 4²
= 36 - 16 = 20
Base = √20 = 2√5
x = 2 * 2√5 = 4√5
The value of x = 4√5
20% of 180ft what is the quantity
Answer: 36ft
Step-by-step explanation: 180*.2=36
Answer:
36 ft
Step-by-step explanation:
to find 20% of 180 ft, multiply 180 ft by 0.20: 0.20(180 ft) = 36 ft
One city has a population of about 11,566,740. Another city has a population of about 6,978,730. What would the combined population be?
Answer:
Step-by-step explanation:
11,566,740
+6,978,730
--------------------
18545470
Not much explaining, just add. A calculator can be used.
The combined population of the city will be 18,545,470.
What is addition?Addition is the mathematical operation of adding two numbers to get total.
We have,
Population of One city = 11,566,740
And,
Population of another city = 6,978,730
Now,
To get combined population,
Add population of both city,
i.e.
Combined population = Population of One city
+ Population of another city
= 11,566,740 + 6,978,730
i.e.
Combined population = 18,545,470
Hence, we can say that the combined population of the city will be 18,545,470.
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I have here $12 would i divide it by 1/3 or divide it by 1/4
Answer:
You could divide $12 with either method
If you divided 12 by 1/4 you would get $48.
Divided by 1/3, $36.
The table below shows 10 data values:
224 245 203 290 217
236 262 216 224 245
What values of minimum, Q1, median, Q3, and maximum should be used to make a box plot for this data?
Minimum = 203, Q1 = 245, median = 230, Q3 = 217, maximum = 290
Minimum = 203, Q1 =217, median = 230, Q3 = 245, maximum = 290
Minimum = 216, Q1 = 236, median = 240, Q3 = 245, maximum = 262
Minimum = 216, Q1 =245, median = 240, Q3 = 236, maximum = 262
Answer:
The answer is the second option
Minimum = 203, Q1 =217, median = 230, Q3 = 245, maximum = 290
Step-by-step explanation:
First order the data from lowest to highest
203, 216, 217, 224, 224, 236, 245, 245 ,262 ,290
Minimun = 203
Maximum =290
Now divide the data in half
203, 216, 217, 224, 224, 236, 245, 245 ,262 ,290
Divide half of the first half of the data. The data of the medium is the first quartile
1) 203, 216, [217], 224, 224
Q1
Divide half of the second half of the data. The data of the medium is the third quartile
2) 236, 245, [245] ,262 ,290
Q3
The average between the two values that are in the center of the 10 ordered data is the median
203, 216, 217, 224, [224, 236], 245, 245 ,262 ,290
[tex]Median =\frac{224+236}{2}=230[/tex]
Median=230
The answer is the second option
Minimum = 203, Q1 =217, median = 230, Q3 = 245, maximum = 290
Answer:
the answer is B :D
Step-by-step explanation:
What is the volume of this prism?
units3=
Answer:
240 units^3
Step-by-step explanation:
To find the volume of a rectangular prism you just multiply length times width times height. So, 8*6*5 which equals 240 units^3.
The dimensions of the prism is given as Length = 8 units, width = 6, Height = 5. Therefore, the volume of the prism is 240 units^3.
How to find the volume of a right rectangular prism?Suppose that the right rectangular prism in consideration be having its dimensions as 'a' units, 'b' units, and 'c' units,
then its volume is given as:
[tex]V = a\times b \times c \: \: unit^3[/tex]
The dimensions of the prism is given as
Length = 8 units
width = 6
Height = 5
To find the volume of a rectangular prism
[tex]V = a\times b \times c \: \: unit^3[/tex]
V = 8 x 6 x 5
V = 240 units^3.
Therefore, the volume of the prism is 240 units^3.
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The fish tank has side lengths 20in, 10in and height 15in. The water level is two inches below the top of the tank. A glass sphere of radius 1in is dropped in to the tank. What is the new distance from the water to the top of the tank? How many of these balls can be put into the tank with the tank not overflowing?
Answer:
Part 1) The new distance from the water to the top of the tank is [tex]1.979\ in[/tex]
Part 2) The maximum number of balls that can be put into the tank with the tank not overflowing is 95
Step-by-step explanation:
step 1
Find the total volume of the tank
[tex]V=20*10*15=3,000\ in^{3}[/tex]
step 2
Find the volume of the tank if the water level is two inches below the top of the tank
[tex]V=20*10*(15-2)=2,600\ in^{3}[/tex]
step 3
Find the volume of the glass sphere
The volume of the glass sphere is equal to
[tex]V=\frac{4}{3}\pi r^{3}[/tex]
we have
[tex]r=1\ in[/tex]
assume
[tex]\pi=3.14[/tex]
substitute
[tex]V=\frac{4}{3}(3.14)(1)^{3}[/tex]
[tex]V=4.2\ in^{3}[/tex]
step 4
What is the new distance from the water to the top of the tank?
we know that
[tex]2 in -----> represent (3,000-2,600)=400\ in^{3}[/tex]
so
using proportion
Find how many inches correspond a volume of [tex]4.2\ in^{3}[/tex]
[tex]\frac{2}{400}\frac{in}{in^{3}}=\frac{x}{4.2}\frac{in}{in^{3}}\\ \\x=4.2*2/400\\ \\x=0.021\ in[/tex]
The new distance from the water to the top of the tank is
[tex]2-0.021=1.979\ in[/tex]
step 5
Find how many of these balls can be put into the tank with the tank not overflowing
we know that
The volume of one ball is equal to [tex]4.2\ in^{3}[/tex]
using proportion
[tex]\frac{1}{4.2}=\frac{x}{400}\\ \\x=400/4.2\\ \\x=95.23\ balls[/tex]
therefore
The maximum number of balls that can be put into the tank with the tank not overflowing is 95
What is the value for f(x) = 42x - 100 when x= 2 ?
Final answer:
To find the value of f(x) when x=2 for the function f(x) = 42x - 100, substitute 2 for x, giving f(2) = 84 - 100, which simplifies to f(2) = -16.
Explanation:
The student is asking to evaluate the function f(x) = 42x - 100 when x = 2. To do this, we simply substitute 2 for x in the equation, which gives us f(2) = 42(2) - 100. Performing the multiplication first, we get 84 - 100. Thus, f(2) equals -16.
The subject is mathematics, specifically related to the evaluation of functions, which is a topic typically covered in high school algebra courses. This is a straightforward example of how to evaluate a function at a given point.
Paula is going to choose the size, color, phrase, and picture for a birthday card for her friend. There are 2 sizes, 4 colors, 7 phrases, and 4 pictures for her to choose from. (The printing company charges a fee to add extra design elements, so she will choose only one of each.)
Answer:
Step-by-step explanation:
maybe 2 by 4 and 7 by 4 then add sorry if i'm wrong
solve this system of linear equations. separate the x- and y- values with a comma. 6x +5y=-19 12x-8y=52
ANSWER
The solution is
(x,y)=(1,-5)
EXPLANATION
The equations are:
1st equation: 6x +5y=-19
2nd equation: 12x-8y=52
Multiply the first equation by 2:
3rd equation: 12x +10y=-38
Subtracy the 2nd equation from the 3rd equations.
12x-12x+10y--8y=-38-52
18y=-90
Divide both sides by 18.
y=-5
Put y=-5 into any of the equations and solve for x.
Preferably, the first equation will do.
6x +5(-5)=-19
6x -25=-19
6x=25-19
6x=6
x=1
The solution is
(x,y)=(1,-5)
name the angles that are complements to SWT
Answer:
Option C
Step-by-step explanation:
we know that
Two angles are complements if their sum is equal to 90 degrees
we have that
∠SWT=50°
so
Its complement must be equal to 40 degrees
we know that
∠USP=40°
∠TSV=40°
therefore
∠USP and ∠TSV are complements to ∠ SWT
Point of tangency of an inscribed circle divides a leg of an isosceles triangle into 3 cm and 4 cm line segments (considered from the vertex to the base). Find the perimeter of the triangle.
Answer:
22
Step-by-step explanation:
The perimeter of the isosceles triangle with a point of tangency that divides one leg into 3 cm and 4 cm segments is 22 cm, having both legs 7 cm each and the base 8 cm.
Given an isosceles triangle with a point of tangency that divides one of the equal legs into segments of 3 cm and 4 cm, we can determine the perimeter of the triangle by first understanding the properties of such a triangle. The two legs are congruent, and by the Theorem 6, the radius from the center to the point of tangency is perpendicular to the tangent and bisects it. Knowing that the point of tangency divides a leg into two parts, we can denote the entire length of one leg as 3 cm + 4 cm, which equals 7 cm.
Since the triangle is isosceles, both legs are equal in length. This means the other leg is also 7 cm. To find the base, we recall the perpendicular from the center bisects it (Theorem 6). Hence, the base is twice one of the segments, either 3 cm or 4 cm. We will choose the longer segment to ensure that the vertex angles remain acute, and hence the base would be 2 * 4 cm = 8 cm.
Now the perimeter (P) of the triangle can be found by adding the lengths of the two legs and the base: P = 7 cm + 7 cm + 8 cm = 22 cm. Therefore, the perimeter of the isosceles triangle is 22 cm.
2.
The quadrilateral shown below has vertices at (-8, 0).(-4,-4), (0,8), and (4,4).
What is the area of the quadrilateral?
The area is 64. Area, as you probably know, is the length times the width of the figure. The length from A to C is approximately radical 128, and the length from C to D is approximately radical 32 (btw, the radical is the check mark with line that goes above and next to the radicand (the number on the inside of the radical)). Multiply these two to get the area, and you should end up with 64.
If the quadrilateral has vertices at (-8, 0), (-4,-4), (0,8), and (4,4). Then the area of the quadrilateral will be 64 square units.
What is a quadrilateral?It is a polygon with four sides. The total interior angle is 360 degrees.
The quadrilateral shown below has vertices at (-8, 0), (-4,-4), (0,8), and (4,4).
Then the area of the quadrilateral will be
Assume the points
(x₁, y₁) = (-8, 0)
(x₂, y₂) = (-4, -4)
(x₃, y₃) = (4, 4)
(x₄, y₄) = (0, 8)
Then the area of the quadrilateral is given as
Area = 1/2 |[(x₁y₂ + x₂y₃ + x₃y₄ + x₄y₁) - (y₁x₂ + y₂x₃ + y₃x₄ + y₄x₁)]|
Area = 1/2|[(-8 × -4 + -4×4 + 4×8 + 0×0) - (0 × -4 + -4 × 4 + 4 × 0 + 8 × -8)]|
Area = 1/2|[(32 - 16 + 32) - ( -16 - 64)]|
Area = 1/2|[48 + 80]|
Area = 1/2|128|
Area = 64
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What is the measure of mrn
16
36
71
87
Answer:
16
Step-by-step explanation:
Exterior angle theorem - the sum of two interior angles (which in this case would be angle R and N) is equal to the measure of the exterior angle.
Using the numbers 8, 6, 4, and 2 write an expression that equals 40.
Answer:
[tex]\large\boxed{(8\times6)-(4\times2)=48-8=40}[/tex]
The expression (8*2)*2 + 6 + 2 uses the numbers 8, 6, 4, and 2 to equal 40. The question tests knowledge of basic arithmetic operations.
Explanation:The question involves using the numbers 8, 6, 4, and 2 to create an expression that equals 40. This is a problem dealing with basic arithmetic operations like addition, subtraction, multiplication, and division. The expression can be formed as follows:
Multiply 8 by 2. (8*2 = 16). Multiply 16 by 2. (16*2 = 32). Add 6 to 32. (32+6 = 38). Add 2 to the 38. (38+2 = 40).
So, the expression is: (8*2)*2 + 6 + 2 = 40
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What is 7x1.5gallons
Answer: 10.5 gallons
Step-by-step explanation:
One imperial gallon is approximately 1.2 US gallons. The US gallon is used in the United States and is equal to exactly 231 cubic inches or 3.785411784 liters. The Imperial gallon or UK gallon is used in the United Kingdom and is equal to approximately 277.42 cubic inches. Its exact value is defined as 4.54609 liters.
If AC is a diameter, which of the following must be a semicircle?
ABC
ACB
TCR
Answer:
abc is the one that must be a simicircle
Answer:
A. ABC.
Step-by-step explanation:
We have been given an image of a circle. We are asked to choose the arc, which must be a semicircle of our given circle.
Upon looking at our given diagram, we can see that AC divides our given circle into two semicircles ABC and ATC.
From our given choices, we can see that option A is the correct choice.
Given: ΔPSQ, PS = SQ PΔPSQ = 50 SQ – PQ = 1 Find: Area of ΔPSQ
Answer:
120 square units
Step-by-step explanation:
In triangle PSQ, PS=SQ. Let PS=SQ=x units.
Since SQ-PQ=1, PQ=SQ-1=x-1 units.
The perimeter of the triangle PSQ is 50 units, so
PS+SQ+PQ=50 units.
Substitute PS=SQ=x un. and PQ=x-1 un.
x+x+x-1=50
3x=51
x=17
Hence
PS=SQ=17 units,
PQ=16 units.
Use Heron's formula to find the area:
[tex]A=\sqrt{p(p-a)(p-b)(p-c)},[/tex]
where p is semi-perimeter and a,b,c are lengths of sides.
[tex]p=\dfrac{17+17+16}{2}=25,\\ \\\\A=\sqrt{25(25-17)(25-17)(25-16)}=\sqrt{25\cdot 8\cdot 8\cdot 9}=5\cdot 8\cdot 3=120\ un^2.[/tex]
What is the radius of each semicircle in the following composite figure?
https://isd402.owschools.com/media/g_mat07_2016/9/img_testa2_composite_figure.gif
9 yd
6 yd
4.5 yd
3 yd
Answer: 3 yd
Step-by-step explanation: The radius is 3 yards because the diameter is 6 and the radius is d/2. 6/2 is equal to 3.
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plz help and god bless
What is the median of Restaurant A's cleanliness ratings?
1
2
3
4
5
Answer: 3
Step-by-step explanation:
Median is the middle number if it is an odd number or if it is even you add the two middle numbers and divide by 2
The median cleanliness rating for Restaurant A is 3.
Explanation:The median of Restaurant A's cleanliness ratings can be found by arranging the ratings in order from lowest to highest and determining the middle value. In this case, the ratings are 1, 2, 3, 4, and 5. Since there is an odd number of ratings, the median is the middle value, which is 3. Therefore, the median cleanliness rating for Restaurant A is 3.
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Jeff's salary is 25% higher than Josh's. By how many percents is Josh's salary less than Jeff's?
PLEASE HELP HAVE TO GET DONE BY TODAY PLEASE!!!!!!!!!!!!!!!!!!
Answer:
Josh's salary is 20% less than Jeff's.
Step-by-step explanation:
Let
x----> Jeff's salary
y----> Josh's salary
we know that
x=1.25y
Solve for y
y=(1/1.25)x
y=0.8x
therefore
Josh's salary is 80% of Jeff's salary
or
Josh's salary is 20% less than Jeff's.
How do you figure this out?
Answer:
∠g and ∠h are complementary angles∠g and ∠h are acute anglesStep-by-step explanation:
Use the given information to determine what the angles can be.
g = 2x -90 . . . . given
g > 0 . . . . . . . . . given
2x -90 > 0
2x > 90 . . . . . add 90
x > 45 . . . . . . divide by 2
__
h = 180 -2x
h > 0
180 -2x > 0
180 > 2x
90 > x
__
The requirement that both angles be greater than zero puts limits on x:
45 < x < 90
We can put this back into the given relations for g and h:
g = 2x -90
x = (g +90)/2
45 < (g +90)/2 < 90 . . . . substitute for x
0 < g/2 < 45 . . . . . . . . . . subtract 45
0 < g < 90 . . . . . . . . . . . . g is an acute angle
Similarly, ...
h = 180 -2x
x = (180 -h)/2 = 90 -h/2
45 < (90 -h/2) < 90 . . . . substitute for x
-45 < -h/2 < 0 . . . . . . . . . subtract 90
90 > h > 0 . . . . . . . . . . . multiply by -2; h is an acute angle
__
We can add the angle measures to see if they are supplementary or complementary:
g + h = (2x -90) +(180 -2x)
g + h = 90 . . . . . simplify; the angles are complementary
__
The relevant observations are ...
∠g and ∠h are complementary angles∠g and ∠h are acute anglesWhat is the correct answer?
Answer:
160
Step-by-step explanation:
The top right quadrant is 90 and the given is 70, adding them equal 160. It is the only option that is greater than 90 degrees anyway.
Lewis has a bag of colored marbles. The bag contains 24 red marbles , 36 blue marbles , and 60 yellow marbles. What are the ratios of the number of red marbles , blue marbles , and yellow marbles to the total number of marbles?
Answer:
Step-by-step explanation:
The total number of marbles is 24 + 36 + 60 = 120
Red: 24/120 = 1/5
Blue: 36/120 = 6/20 = 3/10
Yellow: 60 / 120 = 1/2
A cylindrical shaped drum is used to store basketballs in a gymnasium. The hollow drum measures 48 inches high with a 24 inch radius. If the radius of a basketball is 6 inches, the maximum number of basketballs that the cylindrical drum contains is ______ (192, 48, 96)
Answer:
[tex]96\ basketballs[/tex]
Step-by-step explanation:
step 1
Find the volume of the cylinder (hollow drum)
The volume is equal to
[tex]V=\pi r^{2} h[/tex]
we have
[tex]h=48\ in[/tex]
[tex]r=24\ in[/tex]
substitute
[tex]V=\pi (24)^{2} (48)[/tex]
[tex]V=27,648\pi\ in^{3}[/tex]
step 2
Find the volume of one basketball
The volume of the sphere is equal to
[tex]V=\frac{4}{3}\pi r^{3}[/tex]
we have
[tex]r=6\ in[/tex]
substitute
[tex]V=\frac{4}{3}\pi (6)^{3}[/tex]
[tex]V=288\pi\ in^{3}[/tex]
step 3
Find the maximum number of basketballs that the cylindrical drum contains
so
Divide the volume of the cylinder by the volume of one basketball
[tex]27,648\pi/288\pi=96\ basketballs[/tex]
by car john traveled from his house to miami florida in 6 hours going 14 mph faster elliot can drive from his house to miami florida in 5 hours what is the distance from johns house to miami florida calculating spped distance and tiem
Answer:
420 miles
Step-by-step explanation:
Distance = rate × time
Let's say that the distance is D and that John's speed is S. We know that:
D = S × 6
When Elliot drives at speed S+14:
D = (S+14) × 5
Setting D = D:
S × 6 = (S+14) × 5
6S = 5S + 70
S = 70
Therefore, the distance D is:
D = 70 × 6
D = 420
The distance from John's house to Miami is 420 miles.
The distance from John's house to Miami, Florida is 420 miles, calculated by first determining John's speed using the given information and then applying the formula distance = speed times time.
To calculate the distance from John's house to Miami, Florida, we need to use the formula distance = speed times time. John's travel time is 6 hours. We are not directly given John's speed; instead, we know that Elliot drives 14 mph faster than John and it takes him 5 hours to cover the same distance. Let's denote John's speed as 's'. Therefore, Elliot's speed is 's + 14 mph'. Setting up an equation based on Elliot's travel information, we have distance = (s + 14 mph) times 5 hours.
Since they both travel the same distance, we can also write John's travel information as distance = s times 6 hours. Equating both expressions for distance, we get: s times 6 = (s + 14) times 5. Simplifying, we have 6s = 5s + 70, which leads to s = 70 mph. This means John's speed is 70 mph.
To find the distance to Miami, we return to the distance formula and substitute John's speed: distance = 70 mph times 6 hours = 420 miles. Hence, the distance from John's house to Miami, Florida is 420 miles.