Find the surface area of the rectangular prism. Explain how you got your answer

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The surface area of the rectangular prism is 738 square inches.

Step-by-step explanation:

To find the area of a rectangular prism, you need only find the sum of the area of all six faces.

With any rectangular shape, you'll always have opposite sides being identical, so you can actually define the area of the shape as:

2 × (w × l + w × h + l × h)

We're given a width of 15 inches, a length of 7 inches, and a height of 12 inches, so the surface area of the shape is:

2 × (15 × 7 + 15 × 12 + 7 × 12)

= 2 × (105 + 180 + 84)

= 2 × 369

= 738

So the rectangular prism has a surface area of 738 square inches.

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18

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step-by-step explanation:

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