3 years ago

Translate the sentence into an equation using n to represent the unknown number. Then solve the equation for n

Mathematics

1 answer:

Yakvenalex [24]3 years ago

7 0

I don’t understand either i had the exact problem

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The Average cost of a long distance call in the USA was 31 cents per minute in 1978 and 8 cents in 2008. Find the approximate pe

olya-2409 [2.1K]

Answer:

74%

Step-by-step explanation:

We have been given that the Average cost of a long distance call in the USA was 31 cents per minute in 1978 and 8 cents in 2008.

We will use percent decrease formula to solve our given problem.

$\text{Percent decrease}=\frac{\text{Initial}-\text{Final}}{\text{Initial}}\times 100\%$

$\text{Percent decrease}=\frac{31-8}{31}\times 100\%$

$\text{Percent decrease}=\frac{23}{31}\times 100\%$

$\text{Percent decrease}=0.741935483\times 100\%$

$\text{Percent decrease}=74.1935483\%$

$\text{Percent decrease}\approx 74\%$

Therefore, there is an approximate 74% decrease in cost per minute for the long distance call from 1978 to 2008.

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3 years ago

IS THIS RIGHT??? IF THIS ISNT THEN PLEASE HELP ME!!!!!!

irakobra [83]

Answer: Which question?

7 0

2 years ago

A molecule that can be used as a molecular clock has a neutral mutation rate of one mutation per 40 million years. How many year

Mandarinka [93]

Answer:

240

Step-by-step explanation:

Hope its right, sorry if it isn't.

3 0

2 years ago

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Which number is the<br> same distance away from -12 as 2?

Ray Of Light [21]

Answer:

-26

Step-by-step explanation:

2 is 14 away from -12. The other number that is 14 away from -12 is -26.

-12 + x = 2

x = 14

-12 - 14 = -26

4 0

2 years ago

2(4x-3)>-3(3x)+5x help

Roman55 [17]

Answer:

$x>1/2$

Step-by-step explanation:

$2(4x-3)>-3(3x)+5x$

Expand the brackets.

$8x-6>-9x+5x$

Add -9x and 5x

$8x-6>-4x$

Add 4x and 6x on both sides.

$8x+4x>6$

Add the like terms.

$12x>6$

Divide 12 into both sides.

$12x/12>6/12$

$x>1/2$

3 0

3 years ago

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