All categories

3 years ago

Help me in this x^2 - x = 12

Mathematics

1 answer:

aleksley [76]3 years ago

8 0

x^2 - x = 12

Move 12 over.

x^2-x-12=0

Factor trinomial.

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

x=4,-3

You might be interested in

M² + 18m - 81 help me please

Marina CMI [18]

The question is incomplete

7 0

3 years ago

What is the simplified form of each expression?

eimsori [14]

IM pretty sure the answer is
1.A
2.C
3.A
4.D
5.B
:)

3 0

3 years ago

Read 2 more answers

To help consumers assess the risks they are taking, the Food and Drug Administration (FDA) publishes the amount of nicotine foun

QveST [7]

Answer:

We conclude that the mean nicotine content is less than 31.7 milligrams for this brand of cigarette.

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 31.7 milligrams

Sample mean, $\bar{x}$ = 28.5 milligrams

Sample size, n = 9

Alpha, α = 0.05

Sample standard deviation, s = 2.8 milligrams

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 31.7\text{ milligrams}\\H_A: \mu < 31.7\text{ milligrams}$

We use One-tailed t test to perform this hypothesis.

Formula:

$t_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{s}{\sqrt{n}} }$

Putting all the values, we have

$t_{stat} = \displaystyle\frac{28.5 - 31.7}{\frac{2.8}{\sqrt{9}} } = -3.429$

Now, $t_{critical} \text{ at 0.05 level of significance, 8 degree of freedom } = -1.860$

Since,

$t_{stat} < t_{critical}$

We fail to accept the null hypothesis and accept the alternate hypothesis. We conclude that the mean nicotine content is less than 31.7 milligrams for this brand of cigarette.

3 0

3 years ago

KATRIN_1 [288]

Answer:

D. Zacpszcap. is probably the answer

7 0

3 years ago

Drag each function to the correct location on the table. Not all labels will be used.

nevsk [136]

The next one is 4th degree, so z to the fourth

6 0

3 years ago

Read 2 more answers