The perimeter P of a rectangle is P = 21 + 2w, where I and w are the rectangle's length and width, respectively.
(A) Rewrite the formula to find the length given perimeter and width. Justify each step in your solution with the property used. (B) compite the length of a rectangle with a perimeter 40.2in and width of 6.7in.

see below

Step-by-step explanation:

P = 2l + 2w

Subtract 2w using the subtraction property of equality

P -2w = 2l+2w-2w

P -2w = 2l

Divide each side by 2, using the division property of equality

P/2 -2w/2 = 2l/2

1/2 P -w = l

Now we have P =40.2 and w = 6.7

l =1/2 (40.2) - 6.7

l =20.1-6.7

 =13.4

(a) the volume of the cone is 20/3 in3

hence, option a is correct.

24

step-by-step explanation:

the graph shows 30% of students walk. 80 students were questioned, so the number that said they walk is

30% × 80 = 0.30 × 80 = 24