Find the measure of each angle indicated

Mathematics

1 answer:

Butoxors [25]4 years ago

5 0

Can you take a picture of the problem... because we cant see the shape or any of the angles for that manner.

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What is the value of -3|15 -s|+2s^3 when s=-3

gayaneshka [121]

$-3|15-s|+2s^3\\\\\text{substitute the value of s = -3 to the expression}\\\\-3\cdot|15-(-3)|+2\cdot(-3)^3=-3\cdot|15+3|+2\cdot(-27)=-3\cdot|18|-54\\\\=-3\cdot18-54=54-54=0$

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3 years ago

Keats Library purchases a number of new books, all in the category of biography; the library does not acquire any other books. W

PtichkaEL [24]

Answer:

$\large \boxed{87.5 \, \%}$

Step-by-step explanation:

Let x = the original number of books

Then 0.375x = the total number of biographies

and 0.20 x = the original number of biographies

$\text{Percent increase} = \dfrac{\text{ New number - Old number }}{\text{Old number }} \times 100\, \%\\\\= \dfrac{0.375x - 0.20x}{0.20x} \times 100\, \% = \dfrac{0.175x}{0.20x} \times 100\, \% = 0.875 \times 100\, \% = \mathbf{87.5 \, \%}\\\\\text{The number of biographies has increased by $\large \boxed{\mathbf{87.5 \, \%}}$}$