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3 years ago

Find the product (7v+8)(4v2 - 8v+1)

Mathematics

2 answers:

Misha Larkins [42]3 years ago

5 0

7v(4v2-8v+1)+8(4v2-8v+1)

28v3-56v2+7v+32v2-64v+8

Answer= 28v3 -24v2 -57v +8

Bess [88]3 years ago

4 0

The answer is shown in the pic and the works to show how to get the answer

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3 years ago

Question 6<br> - Which is the graph of y=3/4x-3

algol [13]

Answer:

tthe middle graph.

Step-by-step explanation:

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3 years ago

Wich steps are needed to solve this equation b+6=21

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3 years ago

Read 2 more answers

If the relationship is proportional, what is the missing value from the table

lesya [120]

Given:

Consider the below figure attached with this question.

The table represents a proportional relationship.

To find:

The missing value from the table.

Solution:

If y is proportional to x, then

$y\propto x$

$y=kx$ ...(i)

Where, k is a constant of proportionality.

The relationship passes through the point (-3,-1). Substituting $x=-3,y=-1$ in (i), we get

$-1=k(-3)$

$\dfrac{-1}{-3}=k$

$\dfrac{1}{3}=k$

Putting $k=\dfrac{1}{3}$ in (i), we get

$y=\dfrac{1}{3}x$ ...(ii)

We need to find the y-value for $x=-12$ .

Substituting $x=-12$ in (ii), we get

$y=\dfrac{1}{3}(-12)$

$y=-4$

Therefore, the missing value in the table is -4. Hence, option D is correct.

7 0

3 years ago

The endpoints of EF are E(2, 3) and F(8, 11). The midpoint of EF is M.<br> Find the length of EM.

Serga [27]

The midpoint of EF is M. The length of EM is 5

Given :

The endpoints of EF are E(2, 3) and F(8, 11).

M is the midpoint of EF

Lets find out the midpoint M using midpoint formula

$(\frac{x_1+x_2}{2} ,\frac{y_1+y_2}{2} )\\E (x_1,y_1) is (2,3)\\F(x_2,y_2) is (8,11)$

Substitute the values inside the formula

$(\frac{x_1+x_2}{2} ,\frac{y_1+y_2}{2} )\\\\(\frac{2+8}{2} ,\frac{3+11}{2} )\\\\(5,7)$

Midpoint M is (4,7)

Now to find out length of EM, we use distance formula

$Distance = \sqrt{\left(x_2-x_1\right)^2+\left(y_2-y_1\right)^2}\\\mathrm{The\:distance\:between\:}\left(2,\:3\right)\mathrm{\:and\:}\left(5,\:7\right)\\\sqrt{\left(5-2\right)^2+\left(7-3\right)^2}\\\sqrt{3^2+4^2} \\\sqrt{25}\\5$

So, length of EM= 5

Learn more : brainly.com/question/18332427

5 0

3 years ago