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Crank
3 years ago
5

Solve the equation. x2 - x - 12 = 0

Mathematics
1 answer:
Rudik [331]3 years ago
4 0

Answer:

x = 4 or x = -3

Step-by-step explanation:

Solve for x over the real numbers:

x^2 - x - 12 = 0

The left hand side factors into a product with two terms:

(x - 4) (x + 3) = 0

Split into two equations:

x - 4 = 0 or x + 3 = 0

Add 4 to both sides:

x = 4 or x + 3 = 0

Subtract 3 from both sides:

Answer: x = 4 or x = -3

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Which is the distance from point A to B?<br><br> A) 3<br><br> B) 4<br><br> C) 5<br><br> D) 6
Andre45 [30]

Answer:

c) 5

Step-by-step explanation:

In this question you are being asked to find the hypotenuse of the triangle

the triangle has one side that is 3 and the other is 4

use Pythagoras to find the missing side (a^2+b^2=c^2)

3^2+4^2=c^2

simplify the exponents

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combine like terms/adding

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take the square root

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4 0
3 years ago
Read 2 more answers
​(c) as the sample size n​ increases, what happens to the standard error of the​ mean?
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As the sample size, "n", increases, the standard error of the mean becomes SMALLER.  
8 0
4 years ago
he U.S. Bureau of Labor Statistics reports that the average annual expenditure on food and drink for all families is $5700. Assu
Papessa [141]

Answer:

87.08% percentage of families spend more than $4000 annually on food and drink

Step-by-step explanation:

Given -

average annual expenditure on food and drink for all families is $5700

Mean  (\nu) = 5700

standard deviation (\sigma ) = 1500

Let X be the no of families spend annually on food and drink

percentage of families spend more than $4000 annually on food and drink =

P(X > 4000)  = P(\frac{X - \nu }{\sigma }> \frac{ 4000 - 5700}{1500})

                      =  P(Z > - 1.13)     Using  (Z = \frac{X - \nu }{\sigma })

                      =  1 - P(Z

                      = 1 - .1292

                      = .8708

                       = 87.08%

7 0
4 years ago
What type of parent function does the equation f (x) = 1/2 represent?
serg [7]
I think it’s C. If it is incorrect I apologize.
6 0
3 years ago
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