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3 years ago

Danny and Mark and Evans ages combined is 80. What was there combined age three years ago?

Mathematics

2 answers:

Tasya [4]3 years ago

8 0

Since there are three kids, 3x3=9. 80-9=71. Danny and Mark and Evans ages combined is 71 years

Daniel [21]3 years ago

3 0

<em>Look At The Picture.

</em> $Good Luck!$ <em>
</em>

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Which expression represents the calculation “subtract 10 from 36, then divided by 6”?

ololo11 [35]

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If p is directly proportional to q, and p=9 when q=7.5, find q when p=24.

pishuonlain [190]

<h3>Solution and Explanation:</h3>

If $p$ and $q$ are directly proportional, then they must have a common scalar.

To find $q$ we must first find its scalar. If we let $a$ be the scalar we can form the equation, $ap = q$ .

We are given the information that if $q = 7.5$ then $p = 9$ . We can use that in finding the scalar.

$a \times 9 = 7.5 \\ \frac{a \times 9}{9} = \frac{7.5}{9} \\ a = \frac{75}{90} \\ a = \frac{15}{18}$

Now we can solve for $q$ when $p = 24$ knowing that our scalar is $\frac{15}{18}\\$ .

$ap = q \\ \frac{15}{18} \times 24 = q \\ \frac{360}{18} = q \\ 20 = q$

<h3>Answer:</h3>

$q = 20$ when $p = 24$

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lina2011 [118]

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Answer:

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Step-by-step explanation:

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