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2 years ago

What is the first step to prove that 9n - 4n is divisible by 5?

Mathematics

1 answer:

EleoNora [17]2 years ago

3 0

Answer:

Collect like terms, ie do 9n-4n = 5n ...

5n will then be exactly divisible by 5 as 5n / 5 = n

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You invest $3000 in an account at 3.5% per year simple interest. How much will

Schach [20]

Answer:

Option "D" is correct $3630

Step-by-step explanation:

At the beginning of the 7th year, the money has been in the account for 6 years.

The simple interest on $3000 at 3.5% for 6 years is I = prt:

(3000) = (.035) = (6) = 360

he amount in the account at the beginning of the 7th year is then the original amount plus the interest $3630.

3 0

2 years ago

How to solve this problem?

Ann [662]

It depend on what problem you have

7 0

3 years ago

Ethan correctly 80% of the total questions on his history Test. He correctly answers 32 question how many questions are on Ethan

natka813 [3]

40 questions because 80% of 40 is 32

3 0

3 years ago

Read 2 more answers

4. Why does Miss Maudie only have two small cakes instead of three

Rudiy27

Answer:

Step-by-step explanation:

She only has two cakes because that's all she bought.

8 0

3 years ago

Listed below are amounts (in millions of dollars) collected from parking meters by a security service company and other compan

Vikentia [17]

Answer:

$CV=\frac{0.1252}{1.57}=0.07975$

$CV=\frac{0.1317}{1.72}=0.07657$

The relative variability is almost equal in both samples a slight greater variability can be noticed in the first sample.

Step-by-step explanation:

The coefficient of variation of a sample is defined as the ratio between the mean standard deviation and the sample mean. And it represents the percentage relation of the variation of the data with respect to the average.

$CV=\frac{S}{\bar X}$

In the case of the first sample you have:

$CV=\frac{0.1252}{1.57}=0.07975$

In the case of the second sample you have:

$CV=\frac{0.1317}{1.72}=0.07657$

The relative variability is almost equal in both samples a slight greater variability can be noticed in the first sample.

6 0

3 years ago