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3 years ago

Solve for x: 9x - 2x = 28

Mathematics

2 answers:

Naya [18.7K]3 years ago

4 0

269, it would be like dividing 4 to the 8th power by 2

Alex777 [14]3 years ago

3 0

Simplifying 9x + -2x + -28 = 14 Reorder the terms: -28 + 9x + -2x = 14 Combine like terms: 9x + -2x = 7x -28 + 7x = 14 Solving -28 + 7x = 14 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '28' to each side of the equation. -28 + 28 + 7x = 14 + 28 Combine like terms: -28 + 28 = 0 0 + 7x = 14 + 28 7x = 14 + 28 Combine like terms: 14 + 28 = 42 7x = 42 Divide each side by '7'. x = 6 Simplifying x = 6. Hope this helps

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A random sample of 12 recent college graduates reported an average starting salary of $54,000 with a standard deviation of $6,00

Marianna [84]

Answer: a.) $50188 to $57812

Step-by-step explanation: Confidence Interval (CI) is an interval of values in which we are confident the true mean is in.

The interval is calculated as

x ± $z\frac{s}{\sqrt{n} }$

a. For a 95% CI, z-value is 1.96.

Solving:

54,000 ± $1.96.\frac{6000}{\sqrt{12} }$

54,000 ± $1.96\frac{6000}{3.464}$

54,000 ± 1.96*1732.102

54,000 ± 3395

This means the interval is

50605 < μ < 57395

With a 95% confidence interval, the mean starting salary of college graduates is between 50605 and 57395 or from 50188 to 57812$.

b. The mean starting salary for college students in 2017 is $50,516, which is in the confidence interval. Therefore, since we 95% sure the real mean is between 50188 and 57812, there was no significant change since 2017.

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3 years ago

2/4 plus 1/3 as a fraction

QveST [7]

Answer: 5/6

Step-by-step explanation: trust me on this

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Kyle lives 3/4 mile from his friend Aiden. Kyle is to walk 2/3 of the distance to meet Aiden. What part of a mile must Kyle walk

bearhunter [10]

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1/2 mile

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4 years ago

Esmerelda bought a bag of jelly beans. There were 24 green jelly beans, which made up 8%, percent of all the jelly beans in the

Margarita [4]

So, let's look at the problem once again.

8%, or 8/100 of the bag were green jelly beans.

Let's see what we can do to find out a number of other jelly beans, not including the green ones.

We know that 92% of jelly-beans are not green.

92% is 11.5 times more than 8%
(92/8)

24 (or 8%) times 11.5 = 276

276 - number of jelly beans that are not green.

276 plus 24 = 300.

Answer: 300 jelly beans were in one bag.

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3 years ago