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3 years ago

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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Andre45 [30]

Answer:

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Step-by-step explanation:

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

3^2+4^2=c^2

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4 0

3 years ago

Read 2 more answers

Elan Coil [88]

As the sample size, "n", increases, the standard error of the mean becomes SMALLER.

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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%

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4 years ago

What type of parent function does the equation f (x) = 1/2 represent?

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3 years ago