Isabella purchased 7 books for a total of $79.80. Each book cost the same amount. What was the cost of one book in dollars and cents?

2x3 – 6x2 – 14x + 24 square centimeters

if i'm wrong i'm sorry : )

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step-by-step explanation:

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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°