There is two questions please help me

Step-by-step explanation:

As it is equilateral triangle, l₁ = l₂ = b = 6 cm

Total surface area of triangular prism= (l₁ +l₂ + b)* height

                                                                 = ( 6 + 6 + 6) * 15

                                                                 = 18 * 15

                                                                 = 270 cm²

2) length = l = 8.2 in

Width = w = 3.4 in

height = h = 2

Total surface area of rectangular prism = 2*(lw + wh + hl)

= 2*(8.2*3.4  +  3.4*2  + 2*8.2)

=2 *( 27.88 + 6.8 + 16.4)

= 2 * 51.08

= 102.16

= 102 in²

Your answer would be 36

Step-by-step explanation:

First you start off by rewriting the equation to make it simpler for you to understand all of the steps.

Then you plug in your given values. (x = 8 and y = 5)  

After you plug in your given values you solve all your parenthesis (aka using the Distributive Property of Equations to simplify your equation.)

After that, you have basic math

And now your answer is 36.

I hope this helps you :)