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Arlecino [84]
3 years ago
7

Dan had 249 dollars to spend on 7 books. After buying them he had 18 dollars. How much did each book cost?

Mathematics
1 answer:
Furkat [3]3 years ago
3 0

First, lets subtract the amount he has after the transaction and the amount he had before the transaction.

249 - 18 = 231

Second, divide by the amount of books Dan bought.

231 / 7 = $33 per book.

Best of Luck!

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A quadrilateral has two angles that measure 222° and 81°. The other two angles are in a ratio of 6:13. What are the measures of
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\sf\huge\underline{\star Solution:-}

\rightarrow <u>Ratio of two angles are 6:13.</u>

So, let the one angle be \sf{6x} and another be \sf{13x.}

As we know that,

Sum of all interior angles of a quadrilateral = \sf\pink{360°.}

So let's sum up the given angles,

\rightarrow \sf{222°+81°+6x+13x \:=\:  360°}

\rightarrow \sf{303+19x \:=\:  360°}

\rightarrow \sf{19x \:=\:  360-303}

\rightarrow \sf{19x \:=\:  57}

\rightarrow \sf{x \:=\:  \frac{19}{57}}

\rightarrow \sf{x \:=\:  3}

Hence, \sf{x \:=\:  3}

So, First angle \sf{= \:6x\: = \:6×3 \:=} \sf\purple{18°.}

Second angle \sf{= \:13x\: = \:13×3 \:=} \sf\purple{39°.}

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Hope it helps you:)

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2 years ago
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Step-by-step explanation:

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