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V125BC [204]
3 years ago
6

Can some one help me with this 2s +9 ——— 3r ÷ s (If r=-14 and s=6)

Mathematics
2 answers:
7nadin3 [17]3 years ago
6 0

Answer:

25+9

--------

3r÷5

=2×6+9

----------

3×(-14)÷6

=12+9

---------

(-42)÷6

=21

----

-7

=_3

salantis [7]3 years ago
5 0

\huge \boxed{\mathbb{QUESTION} \downarrow}

2s +9

———

3r ÷ s

(If r = -14 and s = 6)

\large \boxed{\mathfrak{Answer \: with \:Explanation} \downarrow}

\sf\frac{2s + 9}{3r \div s}  \\

Substitute the values of r & s with -14 & 6 respectively.

\sf\frac { 2 ( 6 ) + 9 } { 3 ( - 14 ) \div ( 6 ) } \\

Multiply 2 and 6 to get 12.

\sf\frac{12+9}{\frac{3\left(-14\right)}{6}}  \\

Add 12 and 9 to get 21.

\sf\frac{21}{\frac{3\left(-14\right)}{6}}  \\

Multiply 3 and -14 to get -42.

\sf\frac{21}{\frac{-42}{6}}  \\

Divide -42 by 6 to get -7.

\sf\frac{21}{-7}  \\

Divide 21 by -7 to get -3.

=  \boxed{ \boxed{\bf   \: - 3}}

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Maximizing yield. Hood Apple Farm harvests an average of 30 bushels of apples per tree when 20 trees are planted on an acre of g
strojnjashka [21]

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In order to get the highest yield, 25 tress should be planted

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Given the data in the question;

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t + n/t = 50

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now we get the derivatives

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3 0
3 years ago
Two workers finished a job in 12 days. How long would it take each worker to do the job by himself if one of the workers needs 1
Lorico [155]

Two workers finished a job in 7.5 days.

How long would it take each worker to do the job by himself if one of the workers needs 8 more days to finish the job than the other worker?

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let the completed job = 1

A typical shared work equation

7.5%2Ft + 7.5%2F%28%28t%2B8%29%29 = 1

multiply by t(t+8), cancel the denominators, and you have

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form a quadratic equation on the right

0 = t^2 + 8t - 15t - 60

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Factor easily to

(t-12) (t+5) = 0

the positive solution is all we want here

t = 12 days, the first guy working alone

then

the shirker would struggle thru the job in 20 days.

8 0
3 years ago
Read 2 more answers
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