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Dovator [93]
3 years ago
7

2.

Mathematics
1 answer:
Hitman42 [59]3 years ago
5 0

Answer:

50 years old

Step-by-step explanation:

Let the age of father be x years, the age of elder son be y years

and the age of younger son be z years.

From the first condition, we have

x=2y           ...(i)

From the second condition, we have

x+10=3(z+10)

∴x+10=3z+30

∴x−3z=20      ...(ii)

From the third condition, we have

y−z=15             ...(iii)

Put the value of y from eqn. (i) in (iii) we get

x−2z=30           ...(iv)

Solving (ii) and (iv), we get

x=50

∴ the age of the father is 50 years.

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So the coefficient would be the number that is with a variable. The coefficient of 7.50h is 7.50. The variable is h, variables can be a letter or symbol that stands for something in a equation. For this question, h stands for the number of hours Corinne works. The constant is the number that is alone in the equation. That doesn't have a variable with it. In this equation the constant would be the number 40.


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To solve this I will plug in 25 into "h" in and 300 for "s" in the equation 7.50h + 0.20s + 40 and then solve.


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