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mars1129 [50]
3 years ago
7

Which of the following are solutions to the equation below? Check all that apply. x2 + x - 20 = 0

Mathematics
2 answers:
Mila [183]3 years ago
7 0
Δ = 1 + 4*20 = 81
x' = (-1 + 9)/2 = 4
x'' = (-1 - 9)/2 = -5
4²  + 4 - 20 = 0
(-5)² - 5 - 20 = 0
Ok !
erastova [34]3 years ago
6 0

Answer:-5 and 4

Step-by-step explanation:

apex

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Brut [27]

Answer:

$393.75

$2,446.88

Step-by-step explanation:

Let's take this problem one step at a time. First let's compute for the total price after the sales tax has been added.

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The sales tax is computed by multiplying the total to the sales tax rate.

4,500 x 0.0875 = $393.75

$393.75 is the total sales tax that Brenton will pay.

Now to find the total price with the sales tax included, we simply add the original price and the sales tax value together.

4,500 + 393.75 = $4,893.75

Now that we have the total overall price, we can then compute for how much the 50% down payment Brenton has made.

Down Payment = 50% or 0.5

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We simply multiply both the down payment and the overall price to find how much Brenton has paid.

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Now that we know how much Brenton paid, we also now know how much Brenton financed by subtracting the overall price to his down payment.

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5 0
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What is the property of combining negative and positive numbers
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