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Nookie1986 [14]
4 years ago
6

Solution for x=5-y and x+y=15

Mathematics
1 answer:
zimovet [89]4 years ago
7 0
It might be no solution:

steps-

x=5-y
x+y=15

substitute the x(which is the top problem) into the second one.

(5-y)+y=15

cancel it out

(5-y)+y=15
-5. -5

a negative plus a positive is gonna equal 0

-y+y=15-5

0=10

that is no solution..
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One possibility: 
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                   Cost = 0.06(0)²  -  7.2(0)  +  390  =  $390 per day.

The other choice:
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                          = 0.06(14,400)  -  7.2(120)  +  390
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If you produce any other number of bats in a day ... more than zero
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