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3 years ago

Please answer this question i need it very quick

Mathematics

1 answer:

eimsori [14]3 years ago

4 0

Answer:

500

Step-by-step explanation:

this is what i did i dont how write this is

so 5 to the power of 3 is 5x5x5 i think an the answer to that is 125 so then we get to the crates 2 to the power of 2 is 2x2 which is 4 so then i multiplied the 2 prouducts and got 500

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18x = ~36?

FromTheMoon [43]

Answer:

from the picture the answer is D.

Step-by-step explanation:

$2 \ti4mes \f7rac{?}{?}$

to find x subtract 18x from 4x which will give you -14x=-36

divide both sides by -14

4 0

2 years ago

In class A, John got 85 for his first test John's class mean was 75 and standard deviation was 5. In class B, Kathy got 80 in he

ivanzaharov [21]

Answer:

b. Kathy

Step-by-step explanation:

We compare each of their score by how far away from the mean when in term of the standard deviation. Using the following formula

$\frac{x - \mu}{\sigma}$

For John he is (85 - 75)/5 = 2.

For Kathy she is (80 - 50)/10 = 3.

Since Kathy is 3 standard deviation better than her class' average, while John is only 2's. We conclude that Kathy did better.

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2 years ago

Nine scores have an average of 8. Scores x and x+1 are added, and these increase the average to 9. Find x

Degger [83]

Answer:

x must be 13

Step-by-step explanation:

Represent the nine scores by a, b, c, d, e, f, g, h, i.

Write the following equation to indicate that the average of these nine scores is 8:

a+b+c+d+e+f+g+h+i

----------------------------- = 8, or <em>a+b+c+d+e+f+g+h+i = 72</em> if we multiply both

9 sides of this equation by 9.

Next, we add scores x and x+ 1 to

a+b+c+d+e+f+g+h+i + x + x + 1

and divide the result by 11, as there are now 11 scores instead of just 9:

a+b+c+d+e+f+g+h+i + x + x + 1

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

Earlier, we saw that a+b+c+d+e+f+g+h+i = 72. We can now replace

a+b+c+d+e+f+g+h+i in the above fraction by 72:

72 + 2x + 1

------------------- = 9 (as the new average is 9)

Multiplying both sides of this equation by 11 results in:

73 + 2x = 99, or 2x = 26.

Then x must be 13, and x + 1 must be 14.

3 0

3 years ago

Write 3/1000 as a percent and a decimal - note moving the decimal rule

7nadin3 [17]

Answer:

Step-by-step explanation:

as a % = 3/1000 × 100 = 3/10 = 0.3 %

as a decimal = 3/1000 = 0.003

hope this hepls

plz mark it as brainliest!!!!!!!!!

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3 years ago

Read 2 more answers

If vector c = vector b + vector a, under what circumstance does c = b+a ?

Vitek1552 [10]

The sum of the magnitudes will be the magnitude of the sum when the vectors have the same direction.

6 0

3 years ago