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spayn [35]
3 years ago
8

Robert's father is 4 times as old as robert. After 5 years, father will be three times as old as robert.What is their present ag

es of robert and his father respectively
Mathematics
1 answer:
andreev551 [17]3 years ago
7 0

Answer: Robert's present age is 10 years

Robert father's present age is 40 years

Step-by-step explanation:

Let r = Robert's current age

Let y = Robert father's current age

Robert's father is 4 times as old as robert. This means that

y = 4x

After 5 years, Robert's father will be three times as old as Robert. This means that

y + 5 = 3(x+5)

y + 5 = 3x + 15 - - - - - - - ;1

We will substitute y = 4x into equation 1. It becomes

4x + 5 = 3x + 15

Collecting like terms,

4x - 3x = 15 - 5

x = 10

y = 4x

Substituting x = 10,

y = 4× 10 = 40 years

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Neporo4naja [7]

Answer:

x=8

Step-by-step explanation:

This is a congruent triangle. If we use Pythagorean theorm, we can see that 3^2+y^2=25

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(y is the base of the small triangle)

and since the big triangle and the small triangle are congruent(the ratios are the same), 3 is half of 6, and so the base of the small triangle is half of the big triangle's.

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3 years ago
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artcher [175]

Answer:

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Step-by-step explanation:

Let no. of main floor tickets = x

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3 years ago
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Answer:

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Step-by-step explanation:

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3 0
2 years ago
What is the answer to becca took her cans and plastic bottles to the recycling center. she brought 72 pieces and collected $92.
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3 years ago
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3 years ago
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