If w = 12 units, x = 7 units, and y = 8 units, what is the surface area of the figure?

720 units²

Step-by-step explanation:

5 sides of the base:

w² + 4wx

= 12² + 4(12)(7)

= 480

Slant height² = 8² + 6² = 100

Slant height = 10

4 triangles: 4×½×12×10 = 240

Total area = 480 + 240 = 720 units²

720 units²

Step-by-step explanation:

z = √y² + (w/2)²

= √64+36

= √100

= 10 units

A = 4×z×w/2 + 4×x×w + w²

= 4×10×12/2 + 4×7×12 + 12²

= 240 + 336 + 144

= 720 units²

4 and 5)16.97 or 12√2

6)15.59 or 9√3

7)y = 15.59 or 9√3     x =27

8)17.80

to find the perimeter of the rectangle this is the expression:

x-9+x-9+3x-4+3x-4=138

if we simplify it:

8x-26=138

remember, 138 is what it all adds up to

the length is 11.5cm

the width is 57.5cm

the area is 661.25cm^2

the answers might not be correct use at own risk