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k0ka [10]
2 years ago
7

4.

Mathematics
1 answer:
oksano4ka [1.4K]2 years ago
7 0

Step-by-step explanation:

a = age of Alex

l = age of Lucy

m = age of Megan

a + l + m = 126

l = 3a

l = m + 7

=>

a = l/3

m = l - 7

we are using that in the first equation :

l/3 + l + l - 7 = 126

l + 3l + 3l - 21 = 378

7l = 357

l = 357/7 = 51

a = l/3 = 51/3 = 17

m = l - 7 = 51 - 7 = 44

the ratio of the age of Lucy to Alex to Megan is

51 : 17 : 44

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vodomira [7]

Answer:

Kindly check explanation

5 years from now, Johnathan will be (5 + 4) = 9 years

Step-by-step explanation:

Let Belinda's age = x

Jonathan's age =1/3 x

In 12 years, Belinda will be m years old :

Belinda's age now = x

Jonathan's age 5 years from now, if m = 36

Belinda's age in 12 years, Belinda's age = m

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x = 36 - 12

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Hence Belinda's age now is 24

Jonathan's age now is (1/3) * 12 = 4 years

Hence, 5 years from now, Johnathan will be (5 + 4) = 9 years

5 0
3 years ago
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Nadusha1986 [10]

Answer:

Your answer is

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5 0
3 years ago
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Tatiana [17]

,Answer:

I got -30

Step-by-step explanation:

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3 years ago
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Answer:

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Step-by-step explanation:

Let's simplify step-by-step.

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4 0
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