All categories

3 years ago

Select all the expressions that equal -2 + 5. A -2 - (-5) B -2 - 5 C 5 - 2 D 5 + (-2)

Mathematics

2 answers:

Helga [31]3 years ago

7 0

Answer:

Step-by-step explanation:

Ivahew [28]3 years ago

6 0

Answer:

Hey its me mark brainlest ok thanks

Step-by-step explanation:

You might be interested in

Based on the Nielsen ratings, the local CBS affiliate claims its 11 p.m. newscast reaches 41% of the viewing audience in the are

Nastasia [14]

Answer:

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

$z=\frac{0.36 -0.41}{\sqrt{\frac{0.41(1-0.41)}{100}}}=-1.017$

Step-by-step explanation:

Data given and notation

n=100 represent the random sample taken

$\hat p=0.36$ estimated proportion with the survey

$p_o=0.41$ is the value that we want to test

$\alpha$ represent the significance level

z would represent the statistic (variable of interest)

$p_v$ represent the p value (variable of interest)

Concepts and formulas to use

We need to conduct a hypothesis in order to test the claim that the true proportion is lower than 0.41.:

Null hypothesis: $p\geq 0.41$

Alternative hypothesis: $p < 0.41$

When we conduct a proportion test we need to use the z statistic, and the is given by:

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

The One-Sample Proportion Test is used to assess whether a population proportion $\hat p$ is significantly different from a hypothesized value $p_o$ .

Calculate the statistic

Since we have all the info requires we can replace in formula (1) like this:

$z=\frac{0.36 -0.41}{\sqrt{\frac{0.41(1-0.41)}{100}}}=-1.017$

8 0

3 years ago

Read 2 more answers

Joe snore weighs 195 pounds. Every year his weight increases by 3 pounds. What will he weigh next year

marin [14]

He will weigh 198 lbs. you add 3 lbs to his original weight for each year.

7 0

2 years ago

use an algebraic equation to solve the problem. the sides of a triangle are in the ratio 3:4:5. what is the length of each side

STatiana [176]

This should be the equation:

n + 4/3n + 5/3n = 90

5 0

2 years ago

Chose the correct rule for the graph shown<br> y=2x<br> y= 3x<br> y=2x + 6<br> y = 3x + 3

vitfil [10]

Answer:

y=3x

Step-by-step explanation:

The line keeps going up by 3 and over by 1 and the y intercept is 0.

7 0

2 years ago

Evaluate the line integral ?Cx2zds, where C is the line segment from (0,5,2) to (2,7,8).

Leno4ka [110]

Parameterize $C$ by

$\mathbf r(t)=(x(t),y(t),z(t))=(1-t)(0,5,2)+t(2,7,8)=(2t,5+2t,2+6t)$
$\implies\mathrm ds=\sqrt{\left(\dfrac{\mathrm dx}{\mathrm dt}\right)^2+\left(\dfrac{\mathrm dy}{\mathrm dt}\right)^2+\left(\dfrac{\mathrm dz}{\mathrm dt}\right)^2}\,\mathrm dt=\sqrt{44}\,\mathrm dt$

So the line integral is equivalent to

$\displaystyle\int_Cx^2z\,\mathrm ds=\sqrt{44}\int_{t=0}^{t=1}(2t)^2(2+6t)\,\mathrm dt=\frac{52\sqrt{11}}3$

5 0

3 years ago