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sweet [91]
3 years ago
9

Last summer, Betty earned $4200 by painting houses. She invested

Mathematics
1 answer:
Musya8 [376]3 years ago
3 0

x*(1.035) + (4,200-x)*(1.045) = 4,374.00

1.035x + 4,389.00 -1.045x = 4,374.00

15.00  = .01x

x = 1,500  so x (1,500) invested at 3.5% and  

(4,200 - 1,500) (or 2,700) invested at 4.5%

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Let the amount put in the station's tank = x

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