Geri built a pencil box in the shape of a right rectangular prism. The amount of space inside of the box is 176 cubic inches. What is the height of Geri’s pencil box?

so, converting firstly the mixed fractions to improper fractions and then "adding".

answer:   b

step-by-step explanation:

x2 = 16

x can not be a negative number because 16 is positive

the only answer would be positive 8  

answer: (c) m∠qpo + (2x + 16)° = 180°

step-by-step explanation:

the opposite angles of a quadrilateral are supplementary.

so, ∠o + ∠q = 180°   and   ∠p + ∠r = 180°

since ∠r = 2x + 16°, we can use substitution as follows:

∠p + ∠r = 180°

∠p + (2x + 16)° = 180°