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3 years ago

What is the answr to negative 5 to the third power times negative one

Mathematics

1 answer:

tia_tia [17]3 years ago

6 0

ANSWER -5⁻³ = $\frac{-1}{5^{3}} = \frac{-1}{125} = - 0,008$

$\textbf{Spymore}$

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Evgesh-ka [11]

Answer:

Coffee = $2.00

Juice = $1.50

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Step-by-step explanation:

Given

Let:

$c = coffee\\ j= juice\\ d = doughnut$

So, we have:

Anna

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Barry

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Required

The price of each

We have:

$2c + j + 2d = 7.50$

$c + 3d = 5.00$

$3c + j + 4d = 11.50$

Make c the subject in: $c + 3d = 5.00$

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$2c + j + 2d = 7.50$

$2[5.00 - 3d] + j + 2d = 7.50$

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Make j the subject

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$j = -2.50 +4d$

$3c + j + 4d = 11.50$

$3[5.00 - 3d] + j + 4d = 11.50$

$15.00 - 9d + j + 4d = 11.50$

Make j the subject

$j = 11.50 - 15.00 + 9d -4d$

$j = -3.50 + 5d$

So, we have:

$j = -3.50 + 5d$ and $j = -2.50 +4d$

Equate both values of j

$-3.50 + 5d = -2.50 + 4d$

Collect like terms

$5d - 4d = 3.50 -2.50$

$d = 1.00$

Substitute $d = 1.00$ in $j = -3.50 + 5d$

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$j = -3.50 + 5 * 1.00$

$j = -3.50 + 5.00$

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To solve for c, we substitute $d = 1.00$ in $c + 3d = 5.00$

$c + 3 * 1.00 =5.00$

$c + 3.00 =5.00$

Solve for c

$c =- 3.00 +5.00$

$c =2.00$

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