3 years ago

6(x-5) = 5(x+5)

Mathematics

1 answer:

Mariana [72]3 years ago

4 0

Part 1:

6(x-5) = 5(x+5) (x = 55)

4y + 2 (-3 + 2y) = 1-y (x = 7/9)

Part 2:

4(a-6) = 8a - (4a-24) (No Solution)

4(2x-8) = 8(x-8) (No Solution)

2(3x-3) = -6x-6 (Identity (x = 0))

You might be interested in

Can the division expression 4 divided by 15 be shown as a fraction?

oksian1 [2.3K]

Yes, it can be shown as 4/15.

6 0

2 years ago

This is K12 in sixth grade

zmey [24]

Answer:

Step-by-step explanation:

divide 150 by 12

the answer is 12.5

round 12.5

;)

8 0

2 years ago

Read 2 more answers

A bag contains 1 yellow ball and 9 red balls . A ball is chosen at random from the bag . what is the best answer for the probabi

Strike441 [17]

Your answer is unlikely. That would be a 1 out of 10 chance.

6 0

3 years ago

The cost of tuition is a very important topic. The Alligator surveyed 500 randomly selected students and asked them if they supp

Veronika [31]

Answer:

Survey

Step-by-step explanation: A survey is a research method of collecting data from a particular target group through questions aimed at extracting specific information from them

6 0

2 years ago

If you want to be 95% confident of estimating the population mean to within a sampling error of plus or minus3 and the standard

Aleksandr [31]

Answer:

The sample size required is at least 171

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.95}{2} = 0.025$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.025 = 0.975$ , so $z = 1.96$

Now, find the margin of error M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

What sample size is required?

A samle size of at least n is required, in which n is found when $M = 3, \sigma = 20$

$M = z*\frac{\sigma}{\sqrt{n}}$

$3 = 1.96*\frac{20}{\sqrt{n}}$

$3\sqrt{n} = 20*1.96$

$\sqrt{n} = \frac{20*1.96}{3}$

$(\sqrt{n})^{2} = (\frac{20*1.96}{3})^{2}$

$n = 170.7$

Rouding up

The sample size required is at least 171

5 0

2 years ago