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3 years ago

What is the sum of 8+(-8)-4

Mathematics

2 answers:

Juli2301 [7.4K]3 years ago

3 0

Answer:

-4

Step-by-step explanation:

hope this helps, can i have brainliest? trynna get to the next level lol

tester [92]3 years ago

3 0

Answer:

= - 4

Step-by-step explanation:

Step-by-step

8-8-4

=0-4

= - 4

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Find the solution set of this inequality. Select

hram777 [196]

Answer:

"first number line shown in the diagram"

Step-by-step explanation:

Whenever we have inequality of the form

| x + a | > b

we can write

1. x+a > b, and

2. -(x+a) > b

and solve both.

So we can write

1. 8x + 16 > 16

2. -(8x+16) > 16

<u>Solving 1:</u>

8x > 16 - 16

8x > 0

x > 0

<u>Solving 2:</u>

-(8x+16) > 16

-8x - 16 > 16

-16 -16 > 8x

-32 > 8x

-32/8 > x

-4 > x

Putting these together, we can say x is greater than 0 & x is less than -4

The first number line is right.

6 0

3 years ago

Read 2 more answers

A magazine reports that women trust recommendations from a particular social networking site more than recommendations from any

Misha Larkins [42]

Answer:

a) $p_A$ represent the real population proportion for women

$\hat p_A =\frac{123}{150}=0.82$ represent the estimated proportion for women

$n_A=150$ is the sample size selected for women

b) $p_B$ represent the real population proportion for male

$\hat p_B =\frac{102}{170}=0.6$ represent the estimated proportion for male

$n_B=170$ is the sample size selected for male

c) $(0.82-0.6) - 1.96 \sqrt{\frac{0.82(1-0.82)}{150} +\frac{0.6(1-0.6)}{170}}=0.124$

$(0.82-0.6) + 1.96 \sqrt{\frac{0.82(1-0.82)}{150} +\frac{0.6(1-0.6)}{170}}=0.316$

And the 95% confidence interval would be given (0.124;0.316).

We are confident at 95% that the difference between the two proportions is between $0.124 \leq p_A -p_B \leq 0.316$

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

Part a

$p_A$ represent the real population proportion for women

$\hat p_A =\frac{123}{150}=0.82$ represent the estimated proportion for women

$n_A=150$ is the sample size selected for women

Part b

$p_B$ represent the real population proportion for male

$\hat p_B =\frac{102}{170}=0.6$ represent the estimated proportion for male

$n_B=170$ is the sample size elected for male

$z$ represent the critical value for the margin of error

Part c

The population proportion have the following distribution

$p \sim N(p,\sqrt{\frac{p(1-p)}{n}})$

The confidence interval for the difference of two proportions would be given by this formula

$(\hat p_A -\hat p_B) \pm z_{\alpha/2} \sqrt{\frac{\hat p_A(1-\hat p_A)}{n_A} +\frac{\hat p_B (1-\hat p_B)}{n_B}}$

For the 95% confidence interval the value of $\alpha=1-0.95=0.05$ and $\alpha/2=0.025$ , with that value we can find the quantile required for the interval in the normal standard distribution.

$z_{\alpha/2}=1.96$

And replacing into the confidence interval formula we got:

$(0.82-0.6) - 1.96 \sqrt{\frac{0.82(1-0.82)}{150} +\frac{0.6(1-0.6)}{170}}=0.124$

$(0.82-0.6) + 1.96 \sqrt{\frac{0.82(1-0.82)}{150} +\frac{0.6(1-0.6)}{170}}=0.316$

And the 95% confidence interval would be given (0.124;0.316).

We are confident at 95% that the difference between the two proportions is between $0.124 \leq p_A -p_B \leq 0.316$

8 0

3 years ago

8. An car can hold 8 1/4 gallons of fuel. It contains 4 5/6 gallons of fuel. How

Paul [167]

Answer:

3 5/12

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

suppose that 11 inches of wire cost 66 cents at the same rate how much (in cents) will 28 inches of wire cost

zvonat [6]

Answer:

168 cents or = $1.68

Step-by-step explanation:

11 inches of wire cost 66 cents

28 inches of wire cost x? cents

x = 28 * 66 / 11 = 168 cents or = $1.68

Answer

168 cents or = $1.68

3 0

3 years ago

Danny, Pedro, Derick, Jose, and Willy went to a soccer game. They each got a $3-off coupon to buy themselves a ticket to the gam

kondor19780726 [428]

I think it’s 22.4
the total is 37 then divided by 5 for each person. after you divide you add the $3 coupon so for each person would be 3 by 5 to equal 15. so 37 divided by 5 is 7.4 and then add 15 to get 22.4. If this is wrong please correct me :)

3 0

3 years ago