8^2, 4^3, and 2^6 are 3 ways
18 x 3 + 12 - 1 x 34 + 13 - 2 x 56 = 67
<=Work=>
18 x 3 = 54
1 x 34 = 34
2 x 56 = 112
(54) + 12 - (34) + 13 - (112)
66 - 34 + 13 - 112
32 + 13 - 112
45 - 112
= 67
First of all, you have to find the area of both triangles:


Or just 16 because there are 2 of the same triangles.
Now you have to find the area of the 3 rectangles.
The two that are in the front are 4*3 (l*h) or 12*2 (because there are 2 congruent rectangles. The area of those rectangles is 24 square mm.
Now you find the area of the back rectangle:
5.7*3 = 17.1
Finally, you add all the found numbers to figure out the surface area.
17.1 + 16 + 24 = 57.1 square millimeters.
Hope this helped,
Loafly
Hey there!
a = 5 ; b = 2
Option A.
a + b
= 5 + 2
= 7
Option B.
a - b
= 5 - 2
= 3
Option C.
2a + 3b
= 2(5) + 3(2)
= 10 + 6
= 16
Option D.
5a - b
= 5(5) - 2
= 25 - 2
= 23
Good luck on your assignment and enjoy your day!
~Amphitrite1040:)