Pls help solve these!​

Step-by-step explanation:

#27 Using Pythagorean theorem, the length of side ZY is given by

(ZY)^2 = (x - 1)^2 + (x + 1)^2 = (x^2 -2x + 1) + (x^2 + 2x + 1)

= 2x^2 + 2

Taking the square root,

#28 There are two shapes that make up this figure: a square of side x and a rectangle with sides (x + 6) and (2x - 3 - x) or (x - 3). Therefore, the area of this figure is

A = area of square + area of rectangle

= (x^2) + (x + 6)(x - 3)

= x^2 + (x^2 + 3x - 18)

= 2x^2 + 3x - 18

they would have to work 32 hours.