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3 years ago

When 9 is subtracted from a number and then divided by 2, the answer is 4. What is the number?

Mathematics

2 answers:

drek231 [11]3 years ago

6 0

Answer:

your asking what is 9+x÷2? do you know what x is?

Step-by-step explanation:

I think it would be 4.5+x I'm a little confused. sorry I hope this helped!

tamaranim1 [39]3 years ago

5 0

That doesn’t make since

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HELP ASAP PLEASE I HAVE TO TURN THIS IN SOON

Rom4ik [11]

Answer:

Step-by-step explanation:

It has a slope of -1/4

and it's y intercept is 2

y = -1/4x + 2

7 0

3 years ago

Which t-chart represents the absolute value equation y = |5x|?

Crank

<h3>Answer: Choice C</h3>

=============================================

Explanation:

Choices A, B and D are not true because of the negative y values. The result of an absolute value is never negative. So we can rule out choices A, B, and D. We have choice C as the only thing left, so this must be the answer.

-------------

Another way to see this is by plugging in each x value to see what y value comes out.

If x = -2, then y = |5*x| = |5*(-2)| = |-10| = 10
If x = -1, then y = |5*x| = |5*(-1)| = |-5| = 5
If x = 0, then y = |5*x| = |5*0| = |0| = 0
If x = 1, then y = |5*x| = |5*1| = |5| = 5
If x = 2, then y = |5*x| = |5*2| = |10| = 10

The y outputs from top to bottom are: 10, 5, 0, 5, 10

This matches with what choice C shows.

5 0

4 years ago

What is the largest number? -1.2, -1.1, -2.2, -1.8

RSB [31]

Answer:

-1.1

Step-by-step explanation:

In the case of negative numbers, the farther you are from 0, the smaller the number. So -1.1 is the biggest number of the four

6 0

4 years ago

Read 2 more answers

A sample of 900900 computer chips revealed that 49%49% of the chips do not fail in the first 10001000 hours of their use. The co

dedylja [7]

Answer:

The proportion of chips that do not fail in the first 1000 hours of their use is 52%.

Step-by-step explanation:

The claim made by the company is that 52% of the chips do not fail in the first 1000 hours of their use.

A quality control manager wants to test the claim.

A one-proportion z-test can be used to determine whether the proportion of chips do not fail in the first 1000 hours of their use is 52% or not.

The hypothesis can be defined as:

H₀: The proportion of chips do not fail in the first 1000 hours of their use is 52%, i.e. p = 0.52.

Hₐ: The proportion of chips do not fail in the first 1000 hours of their use is different from 52%, i.e. p ≠ 0.52.

The information provided is:

$\hat p=0.49\\n=900\\\alpha =0.02$

The test statistic value is:

$z=\frac{\hat p-p}{\sqrt{\frac{p(1-p)}{n}}}=\frac{0.49-0.52}{\sqrt{\frac{0.52(1-0.52)}{900}}}=-1.80$

The test statistic value is -1.80.

Decision rule:

If the p-value of the test is less than the significance level then the null hypothesis will be rejected and vice-versa.

Compute the p-value as follows:

$p-value=2\times P(Z$

*Use a z-table.

The p-value = 0.07186 > α = 0.02.

The null hypothesis was failed to be rejected at 2% level of significance.

Conclusion:

The proportion of chips that do not fail in the first 1000 hours of their use is 52%.

8 0

3 years ago

Dawson purchased a pair of shoes on boxing-day that was discounted by 60% from the original price of $150.00. Calculate the amou

Delicious77 [7]

Answer: $90

Step-by-step explanation:

To find 60% of 150, you can simply use this equation, 60 X 150 divided by 100. That will leave you with 90, which is the amount he paid for the shoes. :)

8 0

3 years ago

Read 2 more answers