This is the concept of proportionality, we are required to calculate for the number of hours two crews can use to paint the house altogether.
Here proceed as follows;
number of hours new crew can paint=12 hrs
portion of work painted by new crew in 1 hour= 1/12

number of hours experienced crew can paint=6 hours
Portion of work painted by experienced crew in 1 hour=1/6

Portion of work painted by the two crews altogether in 1 hour will be:
1/6+1/12=1/4

thus the total amount of hours that the two painters will take to paint will be:
4 hours

6 0

3 years ago

I need big help, what are the step by step math problem and the answer to (18/-2)^2?

Serggg [28]

Hii :))

$\tt \: ( \frac{18}{ - 2} ) ^{2} \\ \tt \: = (- \frac{18}{2} ) ^{2} \\ \tt = \frac{-18 \times -18}{-2 \times -2} \\ = \tt \frac{324}{4} \\ = \boxed{\tt\:81}$

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$\overbrace{ \underbrace{ \sf \: \infty \: Carry \: on \: Learning \: \infty }}$

ᴛʜᴇᴇxᴛʀᴀᴛᴇʀᴇꜱᴛʀɪᴀʟ

8 0

3 years ago

Read 2 more answers

Mr. Morris is going to save money and replace his sailboat's mainsail himself. He must determine the area of the mainsail in ord

e-lub [12.9K]

The decomposition of the parallelogram into triangle then into a rectangle is shown below

The measurement we need to calculate the area is the length and the width of the rectangle; 15 feet and 10 feet

Area = 15 × 10 = 150 feet²

4 0

3 years ago