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3 years ago

If x^3 = -27, then what is x?

Mathematics

1 answer:

klio [65]3 years ago

7 0

Answer:

X= -3

Step-by-step explanation:

-3^3 can also be written as -3*-3*-3, which is -27

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Expand then simplify 2(x-5)+2x

poizon [28]

2x-10+2x

answer is 10 because the the 2xs cancel each other out

6 0

3 years ago

Read 2 more answers

If f(x)=4x-11 what is the value of f(5)

Annette [7]

f(5) = 4(5) - 11

f(5) = 20 - 11

f(5) = 9

The answer is 9 :)

Please give BRAINIEST :)

Thanks

5 0

3 years ago

Read 2 more answers

Lucky Charms are sold in boxes with an advertised mean weight of 20.5 oz. The standard deviation is known to be 2.25 oz. A consu

Alinara [238K]

Answer:

Set of hypothesis.

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 20.5 oz

Sample mean, $\bar{x}$ = 20.4 oz

Sample size, n = 50

Population standard deviation, σ = 2.25 oz

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 20.5\text{ oz}\\H_A: \mu < 20.5\text{ oz}$

We use One-tailed z test(left tailed) to perform this hypothesis.

Formula:

$z_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{\sigma}{\sqrt{n}} }$

Putting all the values, we have

$z_{stat} = \displaystyle\frac{20.4 - 20.5}{\frac{2.25}{\sqrt{50}} } = -0.3142$

Based on the significance level, we can make our decision and complete the hypothesis testing.

We may accept the null hypothesis or fail to accept depending on different significance level.

4 0

4 years ago

This graph shows how the amount of tape Kurt has used is related to the number of presents he has wrapped.

Misha Larkins [42]

Answer:

C 3 cm per present

Step-by-step explanation:

1 = 3cm

2 = 6cm

3 = 9cm

8 0

3 years ago

Multiply and simplify out theese brackets(X+1)(x+3)

Lorico [155]

The method in which you do this problem would be to FOIL. First Outer Inner Last. You take the first terms and multiply them. x*x = x^2 (x to the second power). Then you do it with the rest of foil.
x*x = x^2
x*1 = x
x*3 = 3x
1*3 = 3
x^2 + x + 3x + 3 = X^2 + 4x + 3

6 0

3 years ago