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3 years ago

Which equation is an identity?

Mathematics

1 answer:

jok3333 [9.3K]3 years ago

4 0

Answer:

x-4(x+1)=-3(x+1)+1

or,x-4x-4=-3x -3+1

or,-3x-4=-3x-2

or,-6x=-6

x=1

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A publisher reports that 45% of their readers own a laptop. A marketing executive wants to test the claim that the percentage is

nexus9112 [7]

Answer:

$z=\frac{0.40 -0.45}{\sqrt{\frac{0.45(1-0.45)}{370}}}=-1.933$

$p_v =2*P(z$

Step-by-step explanation:

Information given

n=370 represent the sample selected

$\hat p=0.4$ estimated proportion of readers owned a laptop

$p_o=0.45$ is the value that we want to test

z would represent the statistic

$p_v$ represent the p value

Creating the hypothesis

We need to conduct a hypothesis in order to test if the true proportion of readers owned a laptop is different from 0.45, the system of hypothesis are:

Null hypothesis: $p=0.45$

Alternative hypothesis: $p \neq 0.45$

The statistic is:

$z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}}$ (1)

Replacing we got:

$z=\frac{0.40 -0.45}{\sqrt{\frac{0.45(1-0.45)}{370}}}=-1.933$

Calculating the p value

We have a bilateral test so then the p value would be:

$p_v =2*P(z$

8 0

2 years ago

Maria plans to rent a boat. The boat rental costs $60

irina1246 [14]

Answer: she can rent a boat or 2 hrs and 30 mins

Step-by-step explanation:

60+10=70

70+60=130

130+60=190

190+30=220

3 0

3 years ago

Read 2 more answers

X^2 -10x -24 =0 A. (x-4)^2=49 B. (x-5)^2=16 C. (x-5)^2 =49 D. (x-8)^2=64

blondinia [14]

Answer:

Step-by-step explanation:

4 0

3 years ago

Identify the slope and y-intercept. If the equation is in standard form, you may need to switch it to slope-intercept form. Sket

evablogger [386]

Answer:

The slope of line = m = 6

The y-intercept = b = 3

Please check the attached graph below.

Step-by-step explanation:

Given the line

$y = 6x + 3$

We know that the slope-intercept form of the line is

y = mx+b

here

m is the slope

b is the y-intercept

now compare the slope-intercept form with the given line

$y = 6x + 3$

The slope of line = m = 6

The y-intercept = b = 3

Please check the attached graph below.

6 0

2 years ago

What is 7.868 rounded to the nearest 100

DochEvi [55]

7.870 that is the answer since the nearest hundredth

4 0

2 years ago