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Softa [21]
3 years ago
7

What are the solutions for x when y is equal to 0 in the quadratic function y=x^2-8x

Mathematics
1 answer:
Elena L [17]3 years ago
5 0
I would use the quadratic formula for this:

  x = -b ± √b² - 4ac over 2a
  x = 8 ± √64 - 4(1)(0) over 2(1)
  x = 8 ± √64 over 2
  x = 8 <span>± 8 over 2 [simplify]
  x = 4 </span><span>± 4
     x1 = 4 + 4    x2 = 4 - 4
     x1 = 8          x2 = 0


Thus, the solutions for x would be 0 and 8.</span>
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Venus and Serena measured a tennis court and found that it was 42ft longer than it was wide and had a perimeter of 228ft. What w
mr_godi [17]

Answer:

length = 78 feet

width = 36 feet

Step-by-step explanation:

Using one variable and an expression, you can set up an equation equal to the perimeter to find the measure of each side:

width = 'w'

length = '42ft longer than it was wide' = w + 42

The general formula for the perimeter of a rectangle:

P = 2w + 2l

Plugging in the given values and variables:

228 = 2w + 2(w + 42)

Distribute: 228 = 2w + 2w + 84

Combine like terms:  144 = 4w

Divide and solve:  36 = w

w = 36 ft

l = 36 + 42 = 78 ft

8 0
3 years ago
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Answer:

Polynomial equation solver

x-3=3x-2

Standard form:

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Factorization:

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3 0
3 years ago
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blsea [12.9K]

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4 0
3 years ago
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Joan bought a shirt for 25.50 and the sales tax was 6 % what was the total price she paid for the shirt ​
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The total price she paid for the shirt was $27.03

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Your credit card has a balance of $3300 and an annual interest rate of 14%. You decided to pay off the balance over two years. I
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9514 1404 393

Answer:

  • $137.90 more each month
  • $246.00 less total interest

Step-by-step explanation:

The amortization formula is ...

  A = P(r/12)/(1 -(1 +r/12)^(-12t))

for the monthly payment on principal P at annual rate r for t years. Here, we have P=3300, r = 0.14, and t=1, so the monthly payment is ...

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The payment of $296.30 is ...

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3 0
3 years ago
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