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TiliK225 [7]
3 years ago
12

How do I find the factor of the trinomial of y^2+7y-30

Mathematics
1 answer:
wel3 years ago
7 0
Find two numbers that multiply to -30 (last term) and add to 7 (middle coefficient)

The two numbers are 10 and -3
10 times -3 = -30
10 plus -3 = 7

Using those two values gets us the two factors (y+10) and (y-3)

Therefore, y^2+7y-30 factors to (y+10)(y-3)

The equation y^2+7y-30 = (y+10)(y-3) is true for all values of y.
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Answer:

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To calculate how many shifts Joanne needs to work, divide the total cost by the pay per shift and round it up:

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<u>Note</u>: we need to round up, as if Joanne works 104 shifts, she will earn $9,984 which is not quite enough to pay for tuition, residence and books.

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