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3 years ago

Can someone help me with this question, please explain your answer. :D

Mathematics

1 answer:

Debora [2.8K]3 years ago

7 0

Answer:

21/8 yards

Step-by-step explanation:

If Sarah wants to make her own costume she will need 21/8 yards of yarn.

To get this, you multiply 2 by 8 and get 16.

Next, you will add 5 onto 16 and get 21.

Keep your 21 and put is as your numerator.

Now take your 8 and put it as your denominator.

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We want to calculate the line that passes through the points (-7,0) and (-3,-9). Recall that the equation of a line is

$y=mx+b$

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$m=\frac{(d\text{ -b)}}{(c\text{ -a)}}=\frac{b\text{ -d}}{a\text{ -c}}$

so by taking a=-7, b=0, c=-3 and d=-9 we get

$m=\frac{0\text{ - (-9)}}{\text{ -7 -( -3)}}=\frac{9}{\text{ -4}}=\text{ -}\frac{9}{4}$

so our equation becomes

$y=\text{ -}\frac{9}{4}x+b$

so know we want this line to pass through the point (-7,0), so whenever x= -7 then y=0 so we have the equation

$0=\text{ -}\frac{9}{4}(\text{ -7)+b}$

or equivalently

$0=\frac{63}{4}+b$

so if we subtract 63/4 on both sides, we get

$b=\text{ -}\frac{63}{4}$

so our equation would be

$y=\text{ -}\frac{9}{4}x\text{ -}\frac{63}{4}$

3 0

1 year ago

Translate from the English form to algebraic form. The square of the difference of 2x plus y and 8 A. (2x + y)2 + 82 B. 82 – (2x

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I believe that it is C. ((2x + y) - 8)2

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4 years ago

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Answer:

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Step-by-step explanation:

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3 years ago

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