All categories

3 years ago

I’ll fail if I don’t get this right pls help

Mathematics

2 answers:

son4ous [18]3 years ago

7 0

Step-by-step explanation:

In order to find the number of solutions, we have to expand both sides out first.

$3(x - 2) + 7x = \frac{1}{2} (6x - 2)$

First, expand 3(x-2), which will obtain 3x-6.

Next, expand (1/2)(6x-2), which gives 3x - 1.

The result at this point should be as shown below:

$3x - 6 + 7x = 3x - 1$

Now, we would shift all x terms to the left and all number terms to the right.

$3x + 7x - 3x = - 1 + 6$

After simplifying, the final equation would be:

$7x = 5$

This is a linear equation and it has one solution.

$x = \frac{5}{7}$

atroni [7]3 years ago

3 0

Answer:

x = 5/7

Step-by-step explanation:

You might be interested in

A marketing researcher wants to find a 96% confidence interval for the mean amount those visitors spend per person per day while

ki77a [65]

Answer:

$n=(\frac{2.054(12)}{4})^2 =37.97 \approx 38$

So then the minimum sample to ensure the condition given is n= 38

Step-by-step explanation:

Notation

$\bar X$ represent the sample mean for the sample

$\mu$ population mean (variable of interest)

$\sigma=12$ represent the population standard deviation

n represent the sample size

ME = 4 the margin of error desired

Solution to the problem

When we create a confidence interval for the mean the margin of error is given by this formula:

$ME=z_{\alpha/2}\frac{\sigma}{\sqrt{n}}$ (a)

And on this case we have that ME =4 and we are interested in order to find the value of n, if we solve n from equation (a) we got:

$n=(\frac{z_{\alpha/2} \sigma}{ME})^2$ (b)

The critical value for 96% of confidence interval now can be founded using the normal distribution. The significance is $\alpha=1-0.96 =0.04$ . And in excel we can use this formula to find it:"=-NORM.INV(0.02;0;1)", and we got $z_{\alpha/2}=2.054$ , replacing into formula (b) we got:

$n=(\frac{2.054(12)}{4})^2 =37.97 \approx 38$

So then the minimum sample to ensure the condition given is n= 38

5 0

4 years ago

Joy is preparing 20 liters of a 25% saline solution. She has only a 40% solution and a 10% solution in her lab. How many liters

olasank [31]

Answer:

10 Liters of 40% solution

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

Convert 0.384 to a percent Round to the nearest tenth percent.

aniked [119]

Answer:

38.4%

Step-by-step explanation:

1. To convert this decimal into a percent, we have to multiply it by 100. Then, we'll get the percentage.

$0.384 * 100$
$38.4$
38.4%

Therefore, the answer is 38.4%.

7 0

3 years ago

What are the four consecutive numbers whose sum is 50?

nika2105 [10]

X+x+1+x+2+x+3=50
4x+6=50/-6
4x=50-6=44
x=44:4=11
⇒The 1st number is 11, the 2nd is 12, the 3rd is 13 and the 4th is 14.
_______________________________________________________
11+12+13+14=50

If you don't understand something,please ask me.

4 0

4 years ago

Q 18. Find the volume of a cylinder of diameter = 4 mm & height = 8 mm. Round to the nearest tenth if necessary. *

butalik [34]

Answer: 100.5

Step-by-step explanation:

multiply 3.14 by 2 to the 2nd power by 8. so first 2 to the second power is 4. Then 4x8 is 32. Final step is to multiply 3.14 by 32 to get 100.48. Then you gotta round to get 100.5.

4 0

3 years ago