3 years ago

PLEASE HELPPPPP PLEASEEEE

Mathematics

1 answer:

ArbitrLikvidat [17]3 years ago

8 0

The answer to question 2 is d question 3 would beA

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Which expression is equivalent to the expression shown?

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option 3

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$3^7 \times 3^{-4} = 3^7 \times \frac{1}{3^4}$

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Write the equation of the line that passes through the points (3, 6) and (5, 18) using function notation.

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3 years ago

If Alex and Brandon work together, they will finish cleaning the school in 15 hours. Working alone, Brandon can finish the same

andriy [413]

Answer:

Alex can do the job in 60 days alone.

Step-by-step explanation:

Alex and Brandon working together, they can finish the job of cleaning the school in 15 hours. Brandon alone in 20 hours can finish the job.

So, Brandon can complete $\frac{1}{20}$ part of the job in one hour.

Let, Alex alone can finish the same job in x hours.

So, Alex can complete $\frac{1}{x}$ part of the job in one hour.

So, working together they do $(\frac{1}{20} + \frac{1}{x}) = \frac{x + 20}{20x}$ part of the whole job in one hour.

Hence, from the conditions given we can write

$\frac{x + 20}{20x} = \frac{1}{15}$

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Therefore, Alex can do the job in 60 days alone. (Answer)

3 0

3 years ago