Question

I need help with number 13 I don’t understand.

Answer 1

(from left to right) (B, B, A, A and B)

Explanation:

The area of square is length times width, ( 6 multiplied by (x+2), which is 6(x+2).

The area of a rectangle is length times width divided by 2, aka 6x5/2, which is 15.

Since it has to be at most 9, it has to be smaller or equal to 9

if you plug 1, 2 , 3, or 4 in, 2 will be 9 and 1 will be less than nine, fitting in

Answer 2

Explanation:

Area of rectangle = Length x Width = 6(x + 2).

Area of triangle = (1/2) x Length x Width = 6(5)/2.

We have |6(x + 2) - 6(5)/2| ≤ 9.

=> -9 ≤ 6(x + 2) - 15 ≤ 9

=> 6 ≤ 6(x + 2) ≤ 24

=> -6 ≤ 6x ≤ 12

=> -1 ≤ x ≤ 2.