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3 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]3 years ago

7 0

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

Effectus [21]3 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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Artyom0805 [142]

Answer:

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Step-by-step explanation:

As per the question:

Total no. of cards in a deck = 52

No. of spades in a deck = 13

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The no. of ways of selecting 5 cards from a deck = $^{52}C_{5} = \frac{52!}{5!(52 - 5)!} = \frac{52!}{5!47!}$

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Now,

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