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inysia [295]
3 years ago
13

Steve is a painter. He can paint a house in 20 hours. It takes his assistant 30 hours to paint a house. How long, in hours, woul

d it take them to paint a house working together?
Mathematics
2 answers:
padilas [110]3 years ago
8 0
I think the answer is  15 Hours<span />
vitfil [10]3 years ago
4 0

The correct answer is D. 12.


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Can it be a decimal? Only one I can think of is 1 X 31
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Answer:

10

Step-by-step explanation:

substitute the given values into the expression

2(x + z) - y

= 2(6 + 3) - 8

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How much principle, to the nearest dollar, should you invest at 4 percent in order to have $3000 for a vacation to Europe in 3 y
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Answer:

Principle should be $2,667

Step-by-step explanation:

We need $3000 for a vacation to Europe in 3 years.

Using amount formula,

A=P(1+r)^t

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A is amount (A=3000)

r is rate of interest (r=0.04)

t is time (t=3)

Substitute the values into formula and solve for P

3000=P(1+0.04)^3

3000=P(1.04)^3

P=\frac{3000}{1.04^3}

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4 0
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Solve the system of equations
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5x+4y = 73
-4x + 4y = -8

5x + 4y -(-4x+4y) = 73 -(-8)
5x + 4y + 4x - 4y = 81
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x = 81÷9
x = 9

Substitute x = 9 into any of the equations to find y.

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4y = 28
y = 28÷4
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Answers :
x = 9
y = 7
8 0
2 years ago
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