PLS HELP!! Note: Figure is not drawn to scale.

If a = 13 cm, b = 7 cm, and c = 3 cm, what is the surface area of the geometric shape formed by this net?

99

Step-by-step explanation:

(b)(c) = 21

SInce there are 2 triangles with an area of 21, multiply that by 2 and divide it by 1/2.

(c)(a) = 39

Do the same thing

(a)(c) = 39

add everything up

21 + 39 = 60

60 + 39 = 99

Hope this helps!

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.

option 3 . (5x + 1) - (-10x + 6)

step-by-step explanation:

option 1 :

(4x + 3) + (-9x + 4)

or 4x+3 -9x + 4

or -5x + 7

option 2

(x - 2) - (6x - 9)

or x-2-6x + 9

or -5x + 7

option 3

(5x+ + 6)

or 5x + 1 + 10x -6

or 15x -5

option 4

-4x+2x+7-3x

-7x + 2x + 7

-5x + 7

hence only option 3 did   not satisfy the given simplify expression.