Consider the paragraph proof.

Given: D is the midpoint of AB, and E is the midpoint of AC.
Prove:DE = BC



It is given that D is the midpoint of AB and E is the midpoint of AC. To prove that DE is half the length of BC, the distance formula, d = , can be used to determine the lengths of the two segments. The length of BC can be determined with the equation BC = , which simplifies to 2a. The length of DE can be determined with the equation DE = , which simplifies to ________. Therefore, BC is twice DE, and DE is half BC.

Which is the missing information in the proof?

a
4a
a2
4a2

Answer:

Sample Response: The goal is to get x alone on one side of the equals sign. First, isolate the variable by applying the subtraction property of equality to subtract 1/2x from both sides. Next, find a common denominator to combine like terms. Then use inverse operations to multiply both sides by the reciprocal of the fraction coefficient. The result will be x = 16. Finally, check the solution by substituting 16 for x in the original equation.

Step-by-step explanation:

58x = 12x + 2

58x -12x = 2

46x = 2

x = 2/46 = 0.434

There are many situations in which equations can be used. Whenever an unknown quantity has to be found, an equation can be formed and solved.

An equality relationship between two expressions written on both sides of the equal to sign.

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Answer:

n=+ -0.0321563225311

Answer: 2(10y+3x)(10y-3x)

Step-by-step explanation:

2(100y²- 9x²)

2[ (10y+3x)(10y-3x) ]

Answer:

Minimum = 50

First Quartile = 80

Median = 135

Third Quartile = 165

Maximum = 200

Step-by-step explanation:

First, it is important to reorder our values into ascending order:

50, 60, 100, 130, 140, 150, 180, 200

You've correctly identified the minimum, median and maximum values, however the quartiles are where the mistakes lie.

1. In order to calculate the first quartile, you need to look at where the median of the first half of the values is, ie. 50, 60, 100, 130

The median will be the value between (or the average of) 60 and 100:

(60 + 100)/2 = 80

Thus, the first quartile is 80.

2. In order to calculate the third quartile, we must find the median of the second half of the data set, ie. 140, 150, 180, 200

The median will be the value between (or the average of) 150 and 180:

(150 + 180)/2 = 165

Thus the third quartile is 165.

I find it's always a good idea to just draw this out and label the different values on paper to make it a bit easier.

Hope that helped! If you find anything confusing just ask :)

The minimum, first quartile, median, third quartile, and maximum of the data set are:

Minimum = 50

First quartile = 115

Median = 145

Third quartile = 190

Maximum = 200

It is the middle value of the given set of numbers after arranging the given set of numbers in order.

We have,

To find the minimum, first quartile, median, third quartile, and maximum of the given data set, we need to arrange the data in order from smallest to largest:

50, 60, 100, 130, 140, 150, 180, 200

The minimum is the smallest number in the set, which is 50.

To find the first quartile, we need to find the median of the lower half of the data set.

Since there are 8 numbers in the set, the median is the average of the 4th and 5th numbers in the set:

First quartile = (100 + 130)/2 = 115

The median is the middle number in the set.

Since there are 8 numbers in the set, the median is the average of the 4th and 5th numbers in the set:

Median = (140 + 150)/2 = 145

To find the third quartile, we need to find the median of the upper half of the data set.

Since there are 8 numbers in the set, the median is the average of the 6th and 7th numbers in the set:

Third quartile = (180 + 200)/2 = 190

The maximum is the largest number in the set, which is 200.

Therefore,

The minimum, first quartile, median, third quartile, and the maximum of the data set are:

Minimum = 50

First quartile = 115

Median = 145

Third quartile = 190

Maximum = 200

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Answer:

Step-by-step explanation:

Look at the picture.

If polygons ABCD and EFGH are similar, then corresponding sides are in proportion.

[tex]\dfrac{GH}{CD}=\dfrac{FG}{BC}[/tex]

We have

[tex]GH=z,\ CD=10,\ FG=6,\ BC=8[/tex]

Substitute:

[tex]\dfrac{z}{10}=\dfrac{6}{8}[/tex]          croaa multiply

[tex]8z=(10)(6)[/tex]

[tex]8z=60[/tex]           divide both sides by 8

[tex]z=\dfrac{60}{8}\\\\z=7.5[/tex]

Answer:

60

Step-by-step explanation:

There are 5 different ways to choose the first class.

There are 4 classes left to choose from.

There are 4 different ways to choose the second class.

There are 3 classes left to choose from.

There are 3 different ways to chooses the third class.

5*4*3 = 60

Answer:

The correct answer option is D. [tex]10x^4\sqrt{6}+x^3\sqrt{30x}-10x^4\sqrt{3}-x^3\sqrt{15x}[/tex].

Step-by-step explanation:

We are given the following expression:

[tex] \left ( \sqrt { 10 x ^ 4 } -x \sqrt { 5 x ^ 2 } \right ) \left ( 2 \sqrt { 15 x ^ 4 } + \sqrt { 3 x ^ 3 } \right ) [/tex]

Assuming that [tex]x\geq 0[/tex], we are to find its simplified product.

[tex] \left ( \sqrt { 10 x ^ 4 } -x \sqrt { 5 x ^ 2 } \right ) \left ( 2 \sqrt { 15 x ^ 4 } + \sqrt { 3 x ^ 3 } \right ) [/tex]

[tex]\\\\ = 2 \sqrt { 150 x ^ 8 } + \sqrt { 3 0 x ^ 7 }-2x\sqrt{75x^6}-x\sqrt{15x^5} \\\\ =2\sqrt{25\times6x^8}+x^3\sqrt{30x}-2x\sqrt{25\times3x^6}-x^3\sqrt{15x} \\\\ =10x^4\sqrt{6}+x^3\sqrt{30x}-10x^4\sqrt{3}-x^3\sqrt{15x}[/tex]

The simplified product is:

       [tex]10x^4\sqrt{6}+x^3\sqrt{30x}-10x^4\sqrt{3}-x^3\sqrt{15x}[/tex]

The expression is given by:

[tex](\sqrt{10x^4}-x\sqrt{5x^2})(2\sqrt{15x^4}+\sqrt{3x^3})[/tex]

Now we know that:

[tex]\sqrt{x^2}=x\\\\and\\\\\sqrt{x^4}=\sqrt{(x^2)^2}=x^2[/tex]

Hence, we get the expression as follows:

[tex](\sqrt{10x^4}-x\sqrt{5x^2})(2\sqrt{15x^4}+\sqrt{3x^3})=(x^2\sqrt{10}-x\cdot x\sqrt{5})(2x^2\sqrt{15}+x\sqrt{3x})[/tex]

Now, we will use the property that:

[tex](a+b)(c+d)=a(c+d)+b(c+d)[/tex]

Hence, we have the expression as:

[tex]=x^2\sqrt{10}(2x^2\sqrt{15}+x\sqrt{3x})-x^2\sqrt{5}(2x^2\sqrt{15}+x\sqrt{3x})[/tex]

[tex]=2x^4\sqrt{10}\sqrt{15}+x^3\sqrt{10}\sqrt{3x}-2x^4\sqrt{5}\sqrt{15}-x^3\sqrt{5}\sqrt{3x}[/tex]

Now we know that:

[tex]\sqrt{a}\sqrt{b}=\sqrt{ab}[/tex]

i.e. we have:

[tex]=2x^4\sqrt{150}+x^3\sqrt{30x}-2x^4\sqrt{75}-x^3\sqrt{15x}\\\\=2x^4\sqrt{5^2\cdot 6}+x^3\sqrt{30x}-2x^4\sqrt{5^2\cdot 3}-x^3\sqrt{15x}\\\\=10x^4\sqrt{6}+x^3\sqrt{30x}-10x^4\sqrt{3}-x^3\sqrt{15x}[/tex]

Answer: 22

Step-by-step explanation:

28 + 7 + 6 + 3 = 44

then multiply it and you end up with 44 over 2 and then you divide it, which is 22!

your answer would be 22.

-- first, do what is in the parenthesis

28 plus 7 is 35; 35 plus 6 is 41; 41 plus 3 is 44.

-- second, 1/2 is another word for splitting in half or dividing by 2. SO, do 44 divided by 2. you get 22.

i hope this helps! please mark brainliest x

Hello There!

X=2

To solve this, we first need to understand that when we see an X in parentheses, we multiply the number before it in this case 4 by X.

The answer is 2 because we multiply 4 by 2 which is the x value so 4*2 is equal to 8 and they we add 9 to it because the sum of 6 and 3 is 9.

Finally, our answer we get is 17 so our X value is 2.

Have A Great Day!

Answer:

Step-by-step explanation:

y=5/2x+2

2y=5x+4

y=5/2x+2

y=5/2x+2

they are the same line/equation so infinite number of solutions

Answer:

0.5

Step-by-step explanation:

The required simplified value of a is 1/2 .

Given that,
3 +0.5(4a + 8) = 9 – 2a
The simplified value of a is to be determined.

In mathematics, it deals with numbers of operations according to the statements. There are four major arithmetic operators, addition, subtraction, multiplication, and division,

The process in mathematics to operate and interpret the function to make the function or expression simple or more understandable is called simplifying and the process is called simplification.

Here,
3 +0.5(4a + 8) = 9 – 2a
3 + 0.5*4a + 0.5*8 =9 - 2a
3 + 2a + 4 = 9 - 2a
7 - 9 = - 4a
a = 1 / 2

Thus, the required simplified value of a is 1/2.

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Answer:

Green: 5/9 Red:2/9

Step-by-step explanation:

Answer:

D for both

Step-by-step explanation:

Exercise is the condition and healthier is the outcome. So if you exercise then you will be healthier.

All cardinals are red. But not all red birds are cardinals. So d is the only one that is always true

1. if you exercise, then you will be healthier.

2. if a bird is a cardinal, it is red

A conditional statement is a statement that can be written in the form “If P then Q,” where P and Q are sentences.

Given:

Exercise makes you healthier.

So, we have to write in the form of if- then statement

Thus, the statement is if you exercise, then you will be healthier..

Now, for the second statement "Cardinals are red birds."

The conditional statement is  if a bird is a cardinal, it is red.

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Hello There!

To find out if these lengths make a triangle, you have to add up any two sizes and they must be greater than the third side for it to form a triangle.

Let's Test It!

"9+12=21" 21 is greater than 15

"9+15=24" 24 is greater than 12

Yes This Does Form A Triangle!

Answer:

Yes, the triangle lengths 9, 12, and 15 are lengths of the sides of a right triangle.

Step-by-step explanation:

There are multiple different ways to prove that this answer is correct.

To begin, we could recognize that these side lengths are a Pythagorean triple, or multiples of side lengths that satisfy the Pythagorean theorem, and thus prove that the lengths constitute a right triangle. In this case, 9, 12, and 15 represent the 3, 4, 5 Pythagorean triple where each side length is multiplied by a factor of three.

3x3=9

4x3=12

5x3=15

Therefore, these side lengths do make a right triangle because they represent a multiple of a Pythagorean triple.

If we didn’t recognize this, we could always plug the side lengths into the Pythagorean theorem, a^2 + b^2 = c^2.

In this case, we get

9^2 + 12*2 = 15^2

If we simplify, we get:

81+144 = 225

And if simplified further, we get:

225=225,

Which is a true statement, proving that these side lengths do make up a right triangle.

Hope this helps!

[tex]\dfrac{x-3}{x}[/tex] - initial fraction

[tex]\dfrac{x-3+1}{x+1}=\dfrac{2}{3}\\\\\dfrac{x-2}{x+1}=\dfrac{2}{3}\\\\2(x+1)=3(x-2)\\2x+2=3x-6\\x=8\\\\\dfrac{8-3}{8}=\dfrac{5}{8}[/tex]

It's [tex]\dfrac{5}{8}[/tex]

Answer:

d) Isoceles triangle

Step-by-step explanation:

you can only split it down the middle

Answer:

D. Isosceles Triangle

Step-by-step explanation:

Answer:

(-2,0.2)

Step-by-step explanation:  

we have

[tex]f(x)=2(3)^{x}[/tex]

[tex]g(x)=10log(x+3)[/tex]  

Solve the system of equations by graphing

Remember that the solution of the system of equations is the intersection point both graphs

The intersection points are (-1.9,0.2) and (1,6)

see the attached figure

therefore

The solution of the system of equations are the points (-1.9,0.2) and (1,6)

Answer:

[tex]\frac{30}{3x}[/tex]

Step-by-step explanation:

Let

x ----> the number

we know that

The phrase " The quotient of 30 and three times a number" is equal to divide the number 30 by the number x multiplied by 3

so

The algebraic expression is equal to

[tex]\frac{30}{3x}[/tex]

Answer:

x = 19

Step-by-step explanation:

YZ || XW, so ∠Y = ∠W

if ∠Y = ∠W, then ∠W = 2x

since the sum of the angles of a triangle is 180 degrees:

(3x-5) + 2x + 90 = 180

x = 19

Answer:

The coordinates of vertex A" is (3 , 1)

Step-by-step explanation:

* Lets revise The translation of a point

- If the point (x , y) translated horizontally to the right by h units

 then the new point = (x + h , y)

- If the point (x , y) translated horizontally to the left by h units

 then the new point = (x - h , y)

- If the point (x , y) translated vertically up by k units

 then the new point = (x , y + k)

- If the point (x , y) translated vertically down by k units

 then the new point = (x , y - k)

* Now lets solve the problem

∵ Δ ABC has a vertex A = (-4 , 2)

∵ The Δ ABC is translated 2 units right and 5 units down to form

   triangle A′B′C′

- From the rule above the x coordinate id added by 2 and the

 y-coordinate is subtracted by 5

∴ A' = (-4 + 2 , 2 - 5) = (-2 , -3)

∴ The image of vertex A is A' = (-2 , -3)

∵ Δ A'B'C' is then translated 5 units right and 4 units up to form

   triangle A″B″C″

- From the rule above the x coordinate is added by 5 and the

 y-coordinate is add by 4

∴ A" = (-2 + 5 , -3 + 4) = (3 , 1)

* The coordinates of vertex A" is (3 , 1)

Answer:

it is a

Step-by-step explanation:

Answer:

- 5x² - 11x + 2

Step-by-step explanation:

(f + g)(x) = f(x) + g(x)

f(x) + g(x)

= - 4x² - 6x - 1 + (- x² - 5x + 3)

= - 4x² - 6x - 1 - x² - 5x + 3 ← collect like terms

= - 5x² - 11x + 2

Answer:

   -5x^2 -11x +2

Step-by-step explanation:

f(x) = -4x^2 - 6x-1

g(x) = – x^2 - 5x + 3,

Add them together

f(x) =     -4x^2 - 6x-1

+ g(x) = – x^2 - 5x + 3,

-----------------------------------

        -5x^2 -11x +2

Step-by-step explanation:

We know any line that is parallel to other line has same slope.

Here, m1=m2

So, slope will be -1/2.

For this case we have by definition, that if two lines are parallel then their slopes are equal. That is to say:

[tex]m_ {1} = m_ {2}[/tex]

If we have a line of the form:

[tex]y_ {1} = - \frac {1} {2} x_ {1} + b_ {1}[/tex]

Then a parallel line will be given by:

[tex]y_ {2} = - \frac {1} {2} x_ {2} + b_ {2}[/tex]

That is, the slopes are the same!

Answer:

Option C

Answer:

slope = 2

Step-by-step explanation:

Calculate the slope m using the slope formula

m = (y₂ - y₁ ) / (x₂ - x₁ )

with (x₁, y₁ ) = (10, 14) and (x₂, y₂ ) = (2, - 2)

m = [tex]\frac{-2-14}{2-10}[/tex] = [tex]\frac{-16}{-8}[/tex] = 2

Answer:

slope =2

Step-by-step explanation:

To find the slope, we use the formula

m = (y2-y1)/(x2-x1)

    = (-2-14)/(2-10)

    = -16/-8

    =2

Answer:

"It is translated 1 unit left and stretched vertically by a factor of 3"

Step-by-step explanation:

The parent function here is y = x^2

Let's give out some general rules of transformation:

If y = f(x) is a parent function, then

1. If we have y = a * f(x)

| a | > 1 is a stretch;  

0 < | a | <1 is a compression, vertically for both

and

2. If we have y = f(x-c), this means horizontal translation to right c units and y = f(x+c) means horizontal translation c units left

Looking at y = 3(x+1)^2, we can say that "it is vertical stretch by a factor 3 and horizontal translation 1 units left"

Answer:

[tex]\large\boxed{f^{-1}(x)=\dfrac{1}{2}x-\dfrac{1}{2}}[/tex]

Step-by-step explanation:

[tex]f(x)=2x+1\to y=2x+1\\\\\text{exchange x to y and vice versa:}\\\\x=2y+1\\\\\text{solve for y:}\\\\2y+1=x\qquad\text{subtract 1 from both sides}\\\\2y=x-1\qquad\text{divide both sides by 2}\\\\y=\dfrac{x-1}{2}=\dfrac{1}{2}x-\dfrac{1}{2}[/tex]

Answer:

2x10 + 8x6 + 4x2 - x + 3

Step-by-step explanation:

it has the same numbers and variables. it is descending because it's starting from the the highest value or biggest variable then goes from greatest to least from there.

Answer:

[tex]2x^{10}+8 x^{6} +4x^{2} -x+3[/tex]

Step-by-step explanation:

The given polynomial is

[tex]4x^{2} -x+8x^{6}+3+2x^{10}[/tex]

A descending order refers to the position of terms, where the "higher term" has the greatest exponent (greatest grade), and we order from greatest to least to have a descending order, as follows

[tex]2x^{10}+8 x^{6} +4x^{2} -x+3[/tex]

Notice that the temrs are placed from greatest expoenent to least.

Therefore, the answer is [tex]2x^{10}+8 x^{6} +4x^{2} -x+3[/tex]

Answer:15

Step-by-step explanation:

Answer:  The radius of the given circle is 4 units.

Step-by-step explanation:  We are given to find the radius of the circle with the following equation :

[tex]x^2+y^2-10x+6y+18=0~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(i)[/tex]

We know that

the standard equation of a circle with center at the point (h, k) and radius r units is given by

[tex](x-h)^2+(y-k)^2=r^2.[/tex]

From equation (i), we have

[tex]x^2+y^2-10x+6y+18=0\\\\\Rightarrow (x^2-10x+25)+(y^2+6y+9)-25-9+18=0\\\\\Rightarrow (x-5)^2+(y+3)^2-16=0\\\\\Rightarrow (x-5)^2+(y-(-3))^2=4^2.[/tex]

Comparing it with the standard equation, the radius of the circle is given by

[tex]r=4.[/tex]

Thus, the radius of the given circle is 4 units.

Answer: C is correct, No solution

Step-by-step explanation:

Let’s simplify the second equation,

8x-4y=-20

We can divide the whole equation by 4...

8x/4-4y/4=-20/4

Which becomes....

2x-y=-5

Now let’s move things around to see if it’s the same equation as the one on top...

-y=-2x-5

y=2x+5

Now we need to solve the systems...

y=2x-5

y=2x+5

Since their slopes are both 2 and their y-intercepts are not identical, the answer is no solution. The two lines will continue on without ever crossing because they have the same slope.

The solution set for the given system of linear equations is -

(2.5, 0).

A function is a relation between a dependent and independent variable. We can write the examples of function as -

y = f(x) = ax + b

y = f(x, y, z) = ax + by + cz

Given is to find the number of solutions that the given linear system of equations have -

y = 2x - 5

- 8x - 4y = -20

We will solve the given system of equations using the method of substitution. We can write -

y = 2x - 5

- 8x - 4y = - 20

- 8x + 20 = 4y

y = - 2x + 5

Now -

2x - 5 = - 2x + 5

4x = 10

x = 2.5

and -

y = 2 x 2.5 - 5

y = 0

Therefore, the solution set for the given system of linear equations is -

(2.5, 0).

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B 1/3

Ratio of AB:BC

3 : 9

1 : 3