2 years ago

Plz help i will mark brainliest

Mathematics

1 answer:

Stels [109]2 years ago

5 0

Answer:

Step-by-step explanation:

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Theo can paint a fence three times as fast as his sister can. Working together, they can paint a fence in 9 hours. How many hour

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Answer:

12 hours

Step-by-step explanation:

Let Theo's siste can paint a fence in x times

Given.

Theo can paint a fence three times as fast as his sister can. Working together, they can paint a fence in 9 hours.

$\frac{1}{x}+\frac{1}{3x} =\frac{1}{9}\\\frac{3+1}{3x} =\frac{1}{9} \\\frac{4}{3x}=\frac{1}{9}$

Apply cross multiplication

$x=\frac{9\times 4}{3}\\x=\frac{36}{3} \\x=12hours$

Theo’s sister to paint the fence in 12 hours.

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2 years ago

if 5 potatoes together weigh a kilogram and a 8 pears together 1,200 grams which weighs more a potatoe or a pear

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2 years ago

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Elden [556K]

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5:2

Step-by-step explanation:

There are 5 apples and 2 cherries. Put them together to get 5:2.

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Solve the equation a = m – n for the variable n.

MaRussiya [10]

Answer:

$m - a = n$

Step-by-step explanation:

<u>Step 1: Subtract m from both sides </u>

$a - m = m - n - m$

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<u>Step 2: Divide both sides by -1 </u>

$(a - m) / -1 = -n / -1$

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$m - a = n$

Answer: $m - a = n$

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Step-by-step explanation:

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