What is the surface area, in square inchis, of a prism with a length of 12 inches a width of 9 inches and a height of 2 inches

The surface area would be 216 square inches because 9 times 12 times 2 is 216. To find volume, you multiply length times width times height to get your answer.

see explanation

step-by-step explanation:

a

(6r + 7) + (13 + 7r) ( remove brackets and collect like terms )

= 6r + 7 + 13 + 7r

= 13r + 20

b

remove brackets and collect like terms

13 - r - 1 + r

= 12 - r

c

remove brackets and collect like terms

= - 8 - r + 2r - 4

= - 12 + r

d

remove brackets and collect like terms

= 7r - - - 6r

[-   - = - - = - ]

= r -