3 years ago

I need help again, plsssssssss help

Mathematics

2 answers:

zalisa [80]3 years ago

3 0

Answer: pretty sure its C.

Step-by-step explanation:

i know its not a or b but i dont know what d means so good luck

TEA [102]3 years ago

3 0

I believe it is C but i'm not sure

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The area (in square centimeters) of a square coaster can be represented by d^2+8d+16 .

Katarina [22]

ANSWER

a. d+4

b. 4d+16

EXPLANATION

The area of the square coaster is represented by:

${d}^{2} + 8d + 16$

We split the middle term to obtain,

${d}^{2} + 4d + 4d + 16$

We factor by grouping to get,

$d(d + 4) + 4(d + 4)$

$(d + 4)(d + 4) = {(d + 4)}^{2}$

Since area of a square is l² , it means the side length of the square is

$l = d + 4$

b) The perimeter of a square is given by

$P=4l$

We substitute the length in terms of d, to obtain;

$P=4(d + 4)$

$P=4d + 16$

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