Answer:
(1, 3)
Step-by-step explanation:
You are given the h coordinate of the vertex as 1, but in order to find the k coordinate, you have to complete the square on the parabola. The first few steps are as follows. Set the parabola equal to 0 so you can solve for the vertex. Separate the x terms from the constant by moving the constant to the other side of the equals sign. The coefficient HAS to be a +1 (ours is a -2 so we have to factor it out). Let's start there. The first 2 steps result in this polynomial:
[tex]-2x^2+4x=-1[/tex]. Now we factor out the -2:
[tex]-2(x^2-2x)=-1[/tex]. Now we complete the square. This process is to take half the linear term, square it, and add it to both sides. Our linear term is 2x. Half of 2 is 1, and 1 squared is 1. We add 1 into the set of parenthesis. But we actually added into the parenthesis is +1(-2). The -2 out front is a multiplier and we cannot ignore it. Adding in to both sides looks like this:
[tex]-2(x^2-2x+1)=-1-2[/tex]. Simplifying gives us this:
[tex]-2(x^2-2x+1)=-3[/tex]
On the left we have created a perfect square binomial which reflects the h coordinate of the vertex. Stating this binomial and moving the -3 over by addition and setting the polynomial equal to y:
[tex]-2(x-1)^2+3=y[/tex]
From this form,
[tex]y=-a(x-h)^2+k[/tex]
you can determine the coordinates of the vertex to be (1, 3)
Answer:
(1,3)
Step-by-step explanation:
A once thriving company in Teaneck had its monthly profits, in thousands of dollars, modeled by the equation?
f(t) = t^2 + 9/ 1t^2 + 2
where t is in months after June 1st, 2002.
Estimate the company's profits on June 1st, 2002.
Estimate the company's profits many years into the future
Answer:
1) 4.5% 2)1%
Step-by-step explanation:
Given equation The monthly profits: [tex]f(t) = \frac{t^2 + 9}{t^2 + 2}[/tex]
where t is in months after june 1st,2002
To find : The company's profits on June 1st, 2002
which means t=0
⇒ [tex]f(0) = \frac{0^2 + 9}{0^2 + 2}[/tex]
⇒ [tex]f(0) = \frac{9}{2}[/tex]
⇒ [tex]f(0) = 4.5[/tex]
The company's profits on June 1st, 2002 = 4.5%
To find :The company's profits many years into the future
we take limit tends to infinity
[tex]\lim_{n \to \infty}( \frac{t^2 + 9}{t^2 + 2})[/tex]
[tex]\lim_{n \to \infty}( \frac{2t}{2t})=1[/tex]
The company's profits many years into the future = 1%
Given the matrices A and B below, find A + B and 3A
The value of A+B is [tex]\left(\begin{array}{ccc}3&-3\\10&4.5\\10&-1\end{array}\right)[/tex] and the value of 3A is [tex]\left(\begin{array}{ccc}6&-9\\0&15\\21&-6\end{array}\right)[/tex] .
How to add two matrices?To add two matrices, we have to add the element present in the same position in the respective matrices.
(A+B)ij= Aij + Bij
where i is the no. of row and j is the no. of column.
How to multiply a scalar by the matrix?In order to multiply a scalar by the matrix, we have to multiply that scalar with every element of the matrix.
nA= nAij
Here given matrix is
A= [tex]\left(\begin{array}{ccc}2&-3\\0&5\\7&-2\end{array}\right)[/tex]
and the other matrix is
B= [tex]\left(\begin{array}{ccc}1&0\\10&-1/2\\3&1\end{array}\right)[/tex]
The sum of the matrix is A+B= [tex]\left(\begin{array}{ccc}2&-3\\0&5\\7&-2\end{array}\right)[/tex]+ [tex]\left(\begin{array}{ccc}1&0\\10&-1/2\\3&1\end{array}\right)[/tex]
⇒ A+B =[tex]\left(\begin{array}{ccc}2+1&-3+0\\0+10&5+(-1/2)\\7+3&-2+1\end{array}\right)[/tex]
⇒ A+B= [tex]\left(\begin{array}{ccc}3&-3\\10&4.5\\10&-1\end{array}\right)[/tex]
the value of 3A= 3 [tex]\left(\begin{array}{ccc}2&-3\\0&5\\7&-2\end{array}\right)[/tex]= [tex]\left(\begin{array}{ccc}6&-9\\0&15\\21&-6\end{array}\right)[/tex]
Therefore the value of A+B is [tex]\left(\begin{array}{ccc}3&-3\\10&4.5\\10&-1\end{array}\right)[/tex] and the value of 3A is [tex]\left(\begin{array}{ccc}6&-9\\0&15\\21&-6\end{array}\right)[/tex] .
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A triangular tent flap measures 3 1/2 ft along the base and has a height of 4 1/2 ft. How much canvas is needed to make the flap
A recipe calls for of a 1/3 cup of milk for 12 cookies. how many cups of milk are needed to make 108 cookies?
how do i find the finite approximation to estimate the area using the lower sum of 4 rectangles for f(x)= 4-x^2 between x=-2 and x=2?
...?
When n = energy efficiency and Pin = energy input and Pout = energy output, how can you mathematically represent the correct relationship between the energy you put in something and the energy you get out?
A. n = P out * P in
B. n = P out / P in
C. n = P out - P in ...?
Answer:
[tex]n=\frac{P_{out}}{P_{in}}[/tex]
Step-by-step explanation:
We know that,
[tex]\text{Energy efficiency}=\frac{\text{Energy out put}}{\text{Energy in put}}[/tex]
If [tex]P_{in}[/tex] represents the energy input,
[tex]P_{out}[/tex] represents the energy output,
And, n represents energy efficiency,
Hence, the required formula would be,
[tex]n=\frac{P_{out}}{P_{in}}[/tex]
i.e. OPTION B is correct.
what is the slope of
18x-15y=20?
HELP ME ASAP!! Some red white and blue candies were placed in a bowl. Some contain nuts, and some do not. Suppose one of the candies were chosen randomly from all the candies in the bowl. According to the table below, if the candy is blue, what is the probability that is does not contain any nuts?
Red with nuts=10. Red without nuts=10. White with nuts=20. White without nuts=10. Blue with nuts=20. Blue without nuts=30.
A. 20%
B. 40%
C. 60%
D. 10%
Answer:
Option C: 60%
Step-by-step explanation:
The number of blue candies with nuts = 20
The number of blue candies without nuts = 30
The total number of blue candies = 20 + 30 = 50
As the chosen candy is blue, the probability that is does not contain any nuts will be = (The number of blue candies without nuts)/(Total number of blue candies)
So, the probability = 30/50 = 0.6 *100% = 60%
Answer: 20%
Step-by-step explanation:
Which Equation represents this problem?
Pauline can spend $36 on bus fare each week. She needs to ride the bus 5 days a week. How much can she spend each day on bus fare?
A.
36 + b = 5
B.
5 x b = 36
C.
5 ÷ b = 36
D.
36 – b = 5
Determine whether the following relation is a function.
{(3,7), (3,8), (3,-2), (3.4),(3,1)}
A) it is a function because the ordered pairs all have the same x-value.
B) it is not a function because there are multiple y-values paired with a single x-value.
C) it is a function because none of the ordered pairs have the same y-value.
D) it is not a function because none of the ordered pairs have the same y-value.
The relation is not a function it is not a function because there are multiple y-values paired with a single x-value. Option B.
Is the relation a function?A relation is a function only if every input is mapped into a single output.
Here we have the relation {(3,7), (3,8), (3,-2), (3.4),(3,1)}
Remember that the first number of each pair is the input, so we can see that all the inputs are the same one
So the input x = 3 is mapped into different outputs, thus, this is not a function.
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The correct option is B) it is not a function because there are multiple y-values paired with a single x-value.
To determine if a relation is a function, one must check if each x-value is associated with exactly one y-value. In other words, for every x, there should be one and only one y. This is known as the vertical line test in the context of graphs.
Let's examine the given set of ordered pairs: {(3,7), (3,8), (3,-2), (3,4), (3,1)}.
We can see that the x-value of 3 is repeated with different y-values: 7, 8, -2, 4, and 1.
This means that the x-value of 3 is associated with multiple y-values, which violates the definition of a function.
Therefore, the relation is not a function because it fails to satisfy the condition that each x-value must correspond to exactly one y-value.
The presence of multiple y-values for a single x-value is the key indicator that the relation is not a function.
A student earns $10 per hour for tutoring and $7 per hour as a teacher's aide. To have enough free time for studies, he can work no more than 20 hours per week. The tutoring center requires that each tutor spends at least three hours per week tutoring, but no more than eight hours per week. How many hours should he work to maximize his earnings?
hours of tutoring hours as a teacher's aide What is the maximum profit? $
He should work 20 hours every week to optimize his profits. The maximum profit will be $164.
What is a numerical expression?A numerical expression is algebraic information stated in the form of numbers and variables that are unknown. Information can is used to generate numerical expressions.
He should tutor as many hours as possible because he is paid more for it. He may only work for a maximum of 20 hours every day. He must tutor for at least 3 hours but no more than 8 hours to optimum profit, he must tutor for 8 hours leaving 12 hours as a teacher's helper.
To optimize his profits, he should work 20 hours every week.
⇒ 8(10) + 12(7)
⇒ 80 + 84
⇒ 164
Therefore, he should work 20 hours every week to optimize his profit and the maximum profit will be $164.
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Which lines are parallel if m4 = m5? Justify your answer.
The lines r and s are parallel
What are angles in parallel lines?
Angles in parallel lines are angles that are created when two parallel lines are intersected by another line. The intersecting line is known as transversal line.
We can conclude three factors determining parallel lines ,
Alternate angles are equalCorresponding angles are equalCo-interior angles add up to 180°Given data ,
From the figure m4 = m5
And , m4 and m5 are alternate angles
Alternate angles are angles that occur on opposite sides of the transversal line and have the same size
So , m1 = m5 are corresponding angles
Or angle 1 = angle 5
Corresponding angles are the pairs of angles formed on the same side of the transversal that are either both obtuse or both acute and are equal in size.
Similarly , m2 = m6 or angle 2 = angle 6
Hence , the lines r and s are parallel by the properties of angles in parallel lines.
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Your math teacher manages a campground during summer vacation. He loves math so much that he has mapped the campground on a coordinate grid. The campsites have the following coordinate: Brighton Bluff at B(2,2), ponaganset peak at P(4,10) and harmony hill at h(12,2) he wants to build showers that are equidistant from all three campsites. Find the coordinates of the point where the shower should be placed.
Answer:
(5,5)
Step-by-step explanation:
Step 1) Find the perpendicular bisector of BP Step 2) Find the perpendicular bisector of BH Step 3) The intersection point of the perpendicular bisector is where the showers would be built. This is the circumcenter of the circumscribed circle. After doing all of this, you should get that answer.. (5,5)
A line tangent to a circle is ________ to a radius of the circle at the point of tangency.
congruent
perpendicular
parallel
similar
Answer:
Perpendicular... I had the same question and I got a 100%! Hope this helps!
What is the average rate of change of the function below on the interval from x = 0 to x = 2?
f(x)=250(0.5)x
A. -93.75
B. 62.5
C. 0
D. -0.25

Which points are solutions to the linear inequality y < 0.5x + 2? Check all that apply.
(–3, –2)
(–2, 1)
(–1, –2)
(–1, 2)
(1, –2)
(1, 2)
Answer:
Points (-3,-2), (-1,-2), (1,-2) and (1,2) are solutions to the given inequality.
Step-by-step explanation:
We are given the following inequality in the question:
[tex]y < 0.5x + 2[/tex]
We have to check which points give the solution to the given inequality.
1) (-3,-2)
Putting the values in the given inequality:
[tex]-2 < 0.5\times (-3) + 2\\-2 < 0.5\\\text{which is true}[/tex]
The above point is a solution to the given inequality.
2) (-2,1)
Putting the values in the given inequality:
[tex]1 < 0.5\times (-2) + 2\\1 < 1\\\text{which is not true}[/tex]
The above point is not a solution to the given inequality.
3) (-1,-2)
Putting the values in the given inequality:
[tex]-2 < 0.5\times (-1) + 2\\-2 < 1.5\\\text{which is true}[/tex]
The above point is a solution to the given inequality.
4) (-1,2)
Putting the values in the given inequality:
[tex]2< 0.5\times (-1) + 2\\2 < 1.5\\\text{which is not true}[/tex]
The above point is not a solution to the given inequality.
5) (1,-2)
Putting the values in the given inequality:
[tex]-2 < 0.5\times (1) + 2\\-2 < 2.5\\\text{which is true}[/tex]
The above point is a solution to the given inequality.
6) (1,2)
Putting the values in the given inequality:
[tex]2 < 0.5\times (1) + 2\\2 < 2.5\\\text{which is true}[/tex]
The above point is a solution to the given inequality.
Points (-3,-2), (-1,-2), (1,-2) and (1,2) are solutions to the given inequality.
y=f(x)=1/x. Use algebra to find a simplified rational expression for the slope of the line between (3, f(3)) and (3+h, f(3+h))?? h cannot=0. ...?
8 less than a number n is less than 11
Final answer:
To find the number n in the inequality '8 less than a number n is less than 11', we can set up and solve the inequality n - 8 < 11. The answer is that the number n is less than 19.
Explanation:
The question states that 8 less than a number n is less than 11. To solve this, we can set up the inequality:
n - 8 < 11
To isolate n, we can add 8 to both sides:
n < 11 + 8
n < 19
So, the answer is that the number n is less than 19.
I don't know what to do ?
What is the slope of the line whose equation is -3x y=12?
A florist shop represents its first month’s sales with the equation y=168x+8, where x represents the number of days that the shop is open and y represents the sales in dollars. The owner of the shop would like to calculate the number of days it took to reach $3,200 in sales. Which would be used to solve the problem?
A-Substitute 3,200 for x.
B-Add 8 and 3,200.
C- Divide 3,192 by 168.
D-Isolate y in the equation.
Answer:
Option C is the answer.
Step-by-step explanation:
A florist sale is for it's first month is represented by the equation y = 168x + 8
Here y represents the sales in dollars and x represents number of days.
Now we have to calculate the number of days it took to reach $3200 in sales.
For this we will substitute $3200 in place of y and find the value of x by solving the equation.
3200 = 168x + 8
168x = 3200 - 8 = 3192
[tex]x=\frac{3192}{168}=19[/tex]
Therefore Option C. is the correct option.
mrs. fletcher bought 5 coins for $32 each later she sold all the coins for $300 how much more did mrs. fletcher receive for each coin that she paid
Answer:
She received $60 for each coin.Step-by-step explanation:
Mrs. Fletcher bought 5 coins for $32.Then, she sold them for $300.We need to divide to know how much Mrs. Fletcher received for the coins
[tex]\frac{\$300}{5}=\$60[/tex]
She received $60 for each coin.
Now, each coin had a cost of
[tex]\frac{\$32}{5}= \$6.40[/tex]
So, he earned a profit of
[tex]\$60 - \$6.40=\$53.60[/tex]
When you pay a bill in full, you are
Constructing a box. From a rectangular piece of cardboard having dimensions 20 inches x 30 inches, an open box is to be made by cutting out identical squares of area x^2 from each corner and turning up the sides.
(a) Show that the volume of the box is given by the function V(x)=x(20-2x)(30-2x).
(b) Find all positive values of x such that V(x)>0. ...?
height=x length=20-2(what u cut out)=20-2x width=30-2(what u cut out)=30-2x so v(x)=l*w*h=x(20-2x)(30-2x) b) (0,10)
The equation 9(u – 2) + 1.5u = 8.25 models the total miles Michael traveled one afternoon while sledding, where u equals the number of hours walking up a hill and (u – 2) equals the number of hours sledding down the hill. Which is the value of u?
Answer:
2.5
Step-by-step explanation:
Given: The equation [tex]9(u - 2) + 1.5u = 8.25[/tex]models the total miles Michael traveled one afternoon while sledding.
To Find: Which is the value of u?
Solution:
[tex]9(u - 2) + 1.5u = 8.25[/tex]
[tex]9u - 18+ 1.5u = 8.25[/tex]
[tex]10.5u = 8.25+18[/tex]
[tex]10.5u =26.25[/tex]
[tex]u =\frac{26.25}{10.5}[/tex]
[tex]u =2.5[/tex]
Hence the value of u is 2.5
What is the smallest positive value for x where y=sin2x reaches its maximum? How do you figure this out? ...?
To find the smallest positive value for x where y = sin^2x reaches its maximum, we can set sin^2x = 1 and solve for x. The smallest positive value of x where y = sin^2x reaches its maximum is pi/2.
Explanation:To find the smallest positive value for x where y = sin^2x reaches its maximum, we need to consider the properties of the sine function. The sine function oscillates between -1 and +1, with the maximum value of sin^2x being 1. Since the maximum value of sin^2x is 1, we can set sin^2x = 1 and solve for x.
Applying the property of sin^2x = 1, we have:
sin^2x = 1
Taking the square root of both sides, sinx = ±1
Since we are looking for the smallest positive value of x, we take sinx = 1
This means that x = π/2 + 2πn, where n is an integer.
Therefore, the smallest positive value for x where y = sin^2x reaches its maximum is π/2.
reflecting dish of a parabolic microphone has a cross-section in the shape of a parabola. The microphone itself is placed on the focus of the parabola. If the parabola is 60 inches wide and 30 inches deep, how far from the vertex should the microphone be placed?
A dolphins heart beats 688 times in 6 minutes
Solve for x. -3(x-5)-2x=-10
If ABCDE is a regular pentagon and diagonals EB and AC intersect at O, then what is the degree measure of angleEOC?
If ABCDE is a regular pentagon and diagonals EB and AC intersect at O, then the degree measure of angle EOC is 108°.
In Mathematics and Geometry, the sum of the interior angles of both a regular and irregular polygon is given by this formula:
Sum of interior angles = 180 × (n - 2)
Note: The given geometric figure (regular polygon) represents a pentagon and it has 5 sides.
Sum of interior angles = 180 × (5 - 2)
Sum of interior angles = 180 × 3
Sum of interior angles = 540°.
Therefore, the measure of each interior angle is given by;
Interior angle of a pentagon = 540°/5
Interior angle of a pentagon = 108°
From triangle EAO, we have:
2m∠EOA = 180° - (54 + 54)°
m∠EOA = 72°/2
m∠EOA = 34°
Now, we can determine the measure of angle EOC;
m∠EOC = 180° - (34 + 34)°
m∠EOC = 108°