Diana and Sean are considering the quadrilateral with coordinates Q(-2,4), R(1,5), S(2,2), and -1,1). They already determined the sides of the quadrilateral are perpendicular and agree that QRST is a rectangle. However, Sean believes QRST is also a
square.
Which set of work correctly determines whether Sean is correct?

the answer is b

answer: bearing in mind that a rectangle has a perimeter of length + length + width + width.

step-by-step explanation:

p = perimeter

l = length

x=width

p = 2l + 2x

p = 2(l+x)     < ==== perimeter of the base of the box.

loloo

step-by-step explanation:

lololool

step-by-step explanation:

the ratio of red paint to blue paint is always 9/7. that means that, whatever x's value, (4x+12)/(4x-4) has that same ratio. so, set up an equation and cross-multiply to solve for x:

9/7 = (4x+12)/(4x-4)

9(4x-4) = 7(4x+12)

36x - 36 = 28x + 84

8x - 36 = 84

8x = 120

x = 15