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S_A_V [24]
4 years ago
11

It takes nora two hours to paint a wall 5m by 8m, and zack three hours to paint a wall 4m by 9m. together, how long will it take

them to paint a wall 10m by 12m?
Mathematics
1 answer:
Zolol [24]4 years ago
3 0
Nora's speed (5*8)m²/2h= 20 m²/h.
Zack's speed (4*9)m²/3h= 12 m²/h

Together for 1 h they paint (20+12) m²/h=32m²/h

Given area  (10*12)m²=120 m²

120m² *1h/32m² = 3.75 h (3h 45 min) to paint 10m*12m together.

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Step-by-step explanation:

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6 0
3 years ago
What is the area of the triangle at the right?
Pani-rosa [81]

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13.16

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7 0
3 years ago
If the greatest value the variable m can be is less than 9, which of the following inequalities best shows all the possible valu
Flauer [41]

The inequality which shows all possible values of m is; m < 9.

<h3>Which inequality best shows all possible values of m?</h3>

It follows from the task content that the variable in discuss, m is described as less than 9.

On this note, the most appropriate inequality to represent the set of all possible values of m is; m < 9.

Read more on inequalities;

brainly.com/question/25275758

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7 0
2 years ago
Mr. peter travels 130 miles in 2 hours. at this rate, how many miles will he travel in 30 minutes?
enyata [817]
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4 0
4 years ago
Multiply.
prohojiy [21]

Answer:

D. 3x² + 19x - 14

Step-by-step explanation:

Use FOIL to find the answer.

First: x * 3x = 3x²

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Last: 7 * -2 = -14

Form the equation:

3x² - 2x + 21x - 14

Combine like terms.

3x² + 19x - 14

8 0
3 years ago
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