All categories

3 years ago

-2x+4=15 what is the value of x

Mathematics

1 answer:

kifflom [539]3 years ago

6 0

Answer:

-5½

Step-by-step explanation:

-2x = 11

x = -11/2

x = -5½

You might be interested in

(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)

4 0

4 years ago

What is the value of f(3) when f(x) = 4x + 1

valentina_108 [34]

Here is the equation:

$f(x)=4x+1$

You need to find f(3). To do that, substitute all the x's with 3:

$f(x)=4x+1 \rightarrow f(3)=4\times3 + 1$

The first thing you need to do is multiply 4 by 3. Multiply:

$4 \times 3 = 12$

Here is your new equation:

$f(3)=12+1$

To get your answer, you need to add 12 and 1. Add:

$12+1 = 13$

That means:

$\bf f(3)=13$

<em>If you have any questions, feel free to ask in the comments! :)</em>

3 0

3 years ago

Read 2 more answers

The equation A = lw is an example of an

Mrac [35]

Answer:

A=lw is a formula for the area. L is length, W is width.

6 0

3 years ago

What is the ratio of 5 gallons blue paint to 9 gallons of yellow paint?

MakcuM [25]

Wouldn't you divide? If so, 5/9 = 0.6

7 0

4 years ago

Read 2 more answers

After Halloween, Chad had 213 bags of candy. If Chad gives 123 bags of candy to his little brother, how many bags of candy will

stellarik [79]

Answer:

90 bag

Step-by-step explanation:

no of bags will he have left=213-123

=90 bags of candy

3 0

3 years ago