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barxatty [35]
3 years ago
10

What number is 40% of 90

Mathematics
1 answer:
mr_godi [17]3 years ago
3 0

Answer:

36

Step-by-step explanation:

Set up as proportion 40/100 = x/90

Cross multiply 3600 = 100x

DIvide by 100

x = 36

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A square has an area of 100m2 (100m squared)
Nonamiya [84]
Since we know that the area is 100 and we are dealing with a square, that means that all sides are equal. We know that the sides are all 10 because 10*10= 100.

To find the perimeter, we add up all the sides: 10+10+10+10 = 40m
6 0
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A supervisor records the repair cost for 23 randomly selected stereos. A sample mean of $91.82 and standard deviation of $16.84
Assoli18 [71]

Answer: 2.508

Step-by-step explanation:

As per give , we have

Sample size : n= 23

Degree of freedom : df= n-1=22

significance level : \alpha: 1-0.98=0.02

Since , the sample size is small (n<30) and population standard deviation is unknown.

So , we use t-test.

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Hence, the critical value that should be used in constructing the confidence interval = 2.508

6 0
3 years ago
When moving to the left or west, you ______ 1 for every degrees longitude
Vitek1552 [10]

Answer:

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4 0
3 years ago
Read 2 more answers
What is the answer to y=6+4x and y=-5x-21
kodGreya [7K]
Y=4x+6
y=-5x-21

4x+6=-5x-21
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also subtract both sides  by 6
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4 0
3 years ago
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If i eliminate x from 5x+3y=9 <br> 2x-4=40, what would the new two equations be?
viktelen [127]

You cannot eliminate x and end up with two different equations.

5x+3y=9.. B

2x-4=40...A

Solve A for x.

2x - 4 = 40

2x = 40 + 4

2x = 44

x = 44/2

x = 22

The only thing I can think of doing is to plug 22 into B.

5(22) + 2y = 9

110 + 2y = 9...This leads to an answer for y.

No two NEW EQUATIONS is possible.

2y = 9 - 110

2y = -101

y = -101/2

Check your question again.

6 0
3 years ago
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