Let m and h represent hours Mai spends mowing and hauling, respectively. Then (m+h) will be the number of hours Priya spends babysitting. In order for their earnings to be equal, we must have

7m +14h = 8.40(m+h)

Subtract 7m+8.40h: 5.60h = 1.40m

Divide by 1.40: m = 4h

Then the total number of hours worked by either person is

m + h = (4h) +h = 5h

When only whole numbers of hours are worked, the smallest number of hours that will make earnings equal is 5h, with h=1, or 5 hours. In that time, each will earn 5×$8.40 = $42.

Therefore, each of them must work 5 hours and earn $42 before they go to the movies and Mai will work 4 hours mowing and 1 hour hauling.

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3 years ago

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Multiply the complex numbers: (3 + 2i)(3 - 2i)

stealth61 [152]

Answer: 13

Step-by-step explanation:

Multiply 3*3 get 9

Multiply 2*2 get 4

Add 9+4 and get 13

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