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4 years ago

Kelsi's mom, Sue, is 8 times as old as Kelsi. In 10 years , Sue will be 3 times as old as Kelsi. How old are Kelsi and Sue now?

Mathematics

2 answers:

777dan777 [17]4 years ago

7 0

8x+10=3(X+10)
8x+10=3x+30
5x= 20
X=4
Kelsi 4
Mom 32

Effectus [21]4 years ago

6 0

Answer: The present age of Kelsi = 4 years.

The present age of Sue=32 years.

Step-by-step explanation:

Let x be the present age of Kelsi.

Then, Sue's present age = 8x

According to the question, after 10 years Kelsi's's age = x+10

Now, the Sue's age after 10 years will be given by :-

$8x+10=3(x+10)\\\\\Rightarrow\ 8x+10=3x+30\\\\\Rightarrow8x-3x=30-10\\\\\Rightarrow5x=20\\\\\Rightarrow\ x=4$

Hence, The present age of Kelsi = 4 years.

The present age of Sue = 8(4)=32 years.

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Answer:

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Step-by-step explanation:

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3 years ago

Convert each of the following estimates of useful life to a straight-line depreciation rate, stated as a percentage: (a) 10 year

Rzqust [24]

Answer:

a.10 years 1 / 10 x 100 10% per year

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Step-by-step explanation:

Under straight line method of depreciation, equal amount of the depreciation is reduced throughout the useful life of the asset. Using the following formula:

<u>Straight line depreciation rate = 1 / Useful Life x 100 </u>

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a.10 years 1 / 10 x 100 10% per year

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c. 25 years 1 / 25 x 100 4% per year

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4 years ago

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timama [110]

<h3>Answer: c = 7/4</h3>

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

Work Shown:

Compute the function value at the endpoints

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