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larisa86 [58]
4 years ago
14

Which of the following quadratic equations has the solution set (-20,9)? SELECT ALL THAT APPLY

Mathematics
1 answer:
sweet-ann [11.9K]4 years ago
6 0
<h3>Answer:</h3>

A, F

<h3>Step-by-step explanation:</h3>

When the roots are a and b, the factors are (x-a) and (x-b). For roots -20 and 9, the factors are (x+20) and (x-9).

This selects answer A and eliminates choices B and C.

___

Multiplying the two factors gives ...

... (x +20)(x -9) = x² +11x -180

This selects answer F and eliminates choices D and E.

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Answer:

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Step-by-step explanation:

Consider a couple of scenarios for a $20,000 car purchase and a $2000 rebate, with sales tax at 10%.

1) The rebate is applied directly to the purchase price.

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  Amount financed: $19,800.

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2) The rebate is given after the sale is complete.

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Ted effectively has to finance an additional $200, equal to the sales tax on the rebate. So the delayed rebate costs him an extra $395.25 over the life of the loan.

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We have assumed certain tax and payment scenarios. If tax is not an issue, and if the loan terms are such that the rebate can be applied immediately to the loan amount, then <em>there may be no difference in total cost</em>, or the delayed rebate may result in a <em>lower</em> total cost due to the higher monthly payment.

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Step-by-step explanation:

5 0
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Answer:

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