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Paladinen [302]
3 years ago
11

How to solve x^2-4x-5=0 by using the quadratic formula?

Mathematics
1 answer:
padilas [110]3 years ago
3 0

Answer:

x = 5 or -1, put numbers into the formula and calculate

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45001.05

Step-by-step explanation:

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3 years ago
Which of the following statements demonstrates the associative property of multiplication?
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Associative property of multiplication means that it doesn't matter where the parentheses are placed because it will still be the same answer.  

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3 years ago
Charlie guesses that his dog weighs 34. 5 pounds. The dog actually weighs 32. 7 pounds. What is the percent error in Charlie’s g
expeople1 [14]

Percent error is the amount of error to actual value, in percent. The percent error in Charlie’s guess is approximately: Option D: 5.5%

<h3>How to calculate the percent error?</h3>

Suppose the actual value and the estimated values after the measurement are obtained. Then we have:

Error = Actual value - Estimated value

To calculate percent error, we will measure how much percent of actual value, the error is, in the estimated value.

\rm Percent \: Error = |\dfrac{Error}{Actual value}|\times 100 \\\\Percent \: Error = | \dfrac{\text{(Actual Value - Estimated Value)}}{Actual value}|\times 100 \\

(here |x| is such that it makes x non negative, thus, |-5| = 5, and |5| = 5)

For the given case, it is specified that:

Actual weight of dog = 32.7 pounds

Guessed weight of dog, by Charlie : 34.5 pounds.

Error = 32.7 - 34.5 = -1.8 pounds

Thus, percent error in Charlie's guess is calculated as:

\text{Percent Error} = |\dfrac{-1.8}{32.7}| \times 100 \approx 5.5\%

Hence, the percent error in Charlie’s guess is obtained approximately is given by: Option D: 5.5%

Learn more about percent error here:

brainly.com/question/25749180

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2 years ago
Which expressions are equivalent to the one below? Check all that apply.<br> 3x
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Answer:

F and C

Step-by-step explanation:

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3 years ago
What is 69.1 as a decimal?
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69.1 is already a decimal.
6 0
4 years ago
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