3 years ago

Pls do #13 pls pls pls

Mathematics

1 answer:

ivann1987 [24]3 years ago

7 0

y = 7

Simplifying numerators/ denominators

$\frac{1+3}{-1+3}$ = $\frac{y-1}{2+1}$

$\frac{4}{2}$ = $\frac{y-1}{3}$

2 = $\frac{y-1}{3}$ (cross- multiply )

y - 1 = 6 ( add 1 to both sides )

y = 7

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Pumps A, B, and C operate at their respective constant rates. Pumps A and B, operating simultaneously, can fill a certain tank i

jeka94

Let $a,b,c$ be the time it takes for pumps A, B, and C (respectively) to fill 1 tank. Then

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Now,

$\left(\dfrac1a+\dfrac1b\right)-\left(\dfrac1a+\dfrac1c\right)=\dfrac56-\dfrac23\implies\dfrac1b-\dfrac1c=\dfrac16$

Then

$\left(\dfrac1b+\dfrac1c\right)+\left(\dfrac1b-\dfrac1c\right)=\dfrac12+\dfrac16\implies\dfrac2b=\dfrac23\implies b=3$

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8 0

3 years ago

-56 ÷ c = 7, c =<br> pls help me

Rus_ich [418]

Answer:

-392

Step-by-step explanation:

-56 x 7=-392

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3 years ago

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lapo4ka [179]

Answer:

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Step-by-step explanation:

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2 years ago

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Ede4ka [16]

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3 years ago

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3 years ago