2 years ago

Question 14 of 20 : Select the best answer for the question.

Mathematics

2 answers:

ddd [48]2 years ago

5 0

The answer is 21/32 that is the answer of 3/4 ×7/8

max2010maxim [7]2 years ago

3 0

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2 years ago

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mafiozo [28]

The percentage change of specific variables with a specific time period .

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3 years ago

Cara wants to make a stack of encyclopedias that will be 1 meter high. Each book is 5 centimeters wide. How many books will she

Katen [24]

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3 years ago

Billy has $16.30 in dimes and quarters. If he has a total of 88 coins, how many of each type of coin does he have?

a_sh-v [17]

Answer:

38 dimes, 50 quarters

Step-by-step explanation:

Let d = dimes

Let q = quarters

d + q = 88

d = 88 - q

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0.15q = 7.5

q = 50

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d = 88 - 50

d = 38

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3 years ago

Write a general formula to describe the variation: x varies jointly with the inverse of r and the inverse of the square of the s

pshichka [43]

$\bf \qquad \qquad \textit{combined proportional variation} \\\\ \begin{array}{llll} \textit{\underline{y} varies directly with \underline{x}}\\ \textit{and inversely with \underline{z}} \end{array}\implies y=\cfrac{kx}{z}\impliedby \begin{array}{llll} k=constant\ of\\ \qquad variation \end{array} \\\\[-0.35em] \rule{34em}{0.25pt}$

$\bf \stackrel{\textit{"x" varies with}}{x}~~=~~k\stackrel{\textit{inverse of "r"}}{\cfrac{1}{r}}\cdot \stackrel{\stackrel{\textit{inverse of}~\hfill }{\textit{square of a sum}}}{\cfrac{1}{(y+z)^2}}~\hfill x=\cfrac{k}{r(y+z)^2}$

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2 years ago