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2 years ago

John's age is 9 more than three times Rick's age. Which expression represents this?

Mathematics

2 answers:

Lina20 [59]2 years ago

7 0

This answer is A. More then indicates addition

Y_Kistochka [10]2 years ago

4 0

The correct answer is A.

Explanation:
Rick’s age isn’t an independent variable in this equAtion. It’s asking to first multiply 3 by rick’s age, then to add 9 to the product of Ricks age

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The National Assessment of Educational Progress (NAEP) includes a "long-term trend" study that tracks reading and mathematics sk

daser333 [38]

Answer:

The 99% confidence interval estimate for the proportion of all 17-year-old students in 2012 who had at least one parent graduate from college is (0.4964, 0.5236).

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

Sample of 9000, 51% of students had at least one parent who was a college graduate.

This means that $n = 9000, \pi = 0.51$

99% confidence level

So $\alpha = 0.01$ , z is the value of Z that has a pvalue of $1 - \frac{0.01}{2} = 0.995$ , so $Z = 2.575$ .

The lower limit of this interval is:

$\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.51 - 2.575\sqrt{\frac{0.51*0.49}{9000}} = 0.4964$

The upper limit of this interval is:

$\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.51 + 2.575\sqrt{\frac{0.51*0.49}{9000}} = 0.5236$

The 99% confidence interval estimate for the proportion of all 17-year-old students in 2012 who had at least one parent graduate from college is (0.4964, 0.5236).

7 0

2 years ago

What is 562949953421312 multiplied by 2

Nesterboy [21]

I used and got 1.1258999e+15 lol Im sorry Im only in middle school

6 0

3 years ago

There is a seven 1/2% sales tax added to the party bill. Mrs. Gutierrez also wants to add an 18% tip for the servers. This will

Allushta [10]

<span>1.255 times the party bill. x = party bill s = sales tax t = tip C = total cost = the bill, plus the sales tax, and the tip C = x + s + t We know that both the sales tax and the tip are percentages based on the party bill. The sales tax is equal to 7.5% of the party bill. The tip is equal to 18% of the party bill. so, s = (0.075)*x and, t = (0.18)*x Then we replace the s and the t in our equation, C = x + 0.075x + 0.18x Then, we add the elements together. C = (1+0.075+0.18)x C = 1.255x</span>

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3 years ago

Luna is making a rope ladder. Each step of the ladder is 2 1/3 feet wide and uses an additional 1/2 foot on each end of the step

koban [17]

By taking the quotient between the total length and the length needed for each step, we conclude that Luna can make 9 steps.

<h3>How many steps can she make from the rope?</h3>

To find this, we need to take the quotient between the total length of the rope and the length needed for each step.

She has a total length of 30ft.

For each step she needs (2 + 1/3) ft plus (1/2) ft for each knot, and there are two knots, then each step needs: (2 + 1/3)ft + 2*(1/2)ft = (3 + 1/3) ft.

Then the number of steps that can be made is:

N = (30 ft)/(3 + 1/3) ft. = 9

She can make 9 steps or the lader.

If you want to learn more about quotients:

brainly.com/question/8952483

#SPJ1

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1 year ago

How many gloves did mrs edwards knit

marta [7]

Answer:

your question does not make sense please provide more details about your problem

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2 years ago