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3 years ago

-2(x+5)=4 Can someone explain I need an one number answer.

Mathematics

2 answers:

Irina18 [472]3 years ago

7 0

Answer:

Explanation:

−

take 10 from both sides

−

divide both sides by -2 to find x

Step-by-step explanation:

Black_prince [1.1K]3 years ago

5 0

-7 hope this helps

brainliest if its rights ples

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What is the point-slope form of a line that has a slope of –4 and passes through point (–3, 1)?

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Answer:

y - 1 = - 4(x + 3)

Step-by-step explanation:

The equation of a line in point- slope form is

y - b = m(x - a)

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Here m = - 4 and (a, b) = (- 3, 1), hence

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3 years ago

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(1 pt) In a study of red/green color blindness, 950 men and 2050 women are randomly selected and tested. Among the men, 89 have

Ivahew [28]

Answer: (0.066,0.116)

Step-by-step explanation:

The confidence interval for proportion is given by :-

$p_1-p_2\pm z_{\alpha/2}\sqrt{\dfrac{p_1(1-p_1)}{n_1}+\dfrac{p_2(1-p_2)}{n_2}}$

Given : The proportion of men have red/green color blindness = $p_1=\dfrac{89}{950}\approx0.094$

The proportion of women have red/green color blindness = $p_2=\dfrac{6}{2050}\approx0.003$

Significance level : $\alpha=1-0.99=0.01$

Critical value : $z_{\alpha/2}=z_{0.005}=\pm2.576$

Now, the 99% confidence interval for the difference between the color blindness rates of men and women will be:-

$(0.094-0.003)\pm (2.576)\sqrt{\dfrac{0.094(1-0.094)}{950}+\dfrac{0.003(1-0.003)}{2050}}\approx0.091\pm 0.025\\\\=(0.09-0.025,0.09+0.025)=(0.066,\ 0.116)$

Hence, the 99% confidence interval for the difference between the color blindness rates of men and women= (0.066,0.116)

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4 years ago

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4 years ago

An experiment involves selecting a numbered chip, some black and some white, from a bag of

Nezavi [6.7K]

Answer:

4/9

Step-by-step explanation:

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3 years ago

An unopened cereal box contains `15/28` cubic foot of cereal. If the box is full, and the length and height of the box are `5/7`

VikaD [51]

Answer:

1/2ft

Step-by-step explanation:

15/28=(5/7)(1 1/2)(w)

15/28=(5/7)(3/2)w

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(15/28)/(15/14)=w

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4 years ago