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777dan777 [17]
3 years ago
9

ALL MY POINTS !!! (But 2 for 1)

Mathematics
2 answers:
iren [92.7K]3 years ago
6 0

Answer:

hai

Step-by-step explanation:

Lynna [10]3 years ago
5 0

Answer:

1. Jenny is 20 and Leo is 10 years old now

2. They'll meet at the 60th day after their last meeting on Monday

Step-by-step explanation:

1.

Given

Let J represents Jenny and L represents Leo

From the question;

J = 2L ---- Now

J - 5 = 3(L - 5) --- 5 years ago

Required

Find J and L

Substitute 2L for J in the second equation.

This gives

2L - 5 = 3(L - 5)

Open bracket

2L - 5 = 3L - 15

Add 15 - 2L to both sides

2L - 5 + 15 - 2L = 3L - 15 + 15 - 2L

Collect like terms

2L - 2L - 5 + 15 = 3L - 2L - 15 + 15

10 = L

L = 10

Substitute 10 for L in J = 2L

J = 2 * 10

J = 20

Hence, Leo is currently 10 years old and Jenny is currently 20 years old.

2. Give

Liza = once every 6 days.

Jenny = once every 4 days

Olga = once every 10 days.

Required

When next will they meet

This question implied that the we get the least common factor of the given data.

Liza = 6, 12, 18, 24, 30, 36, 42, 48, 54, 60, 66, 72.....

Jenny. = 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 60, 64....

Olga = 10, 20, 30, 40, 50, 60, 70, 80....

From the above, 60 is the least common factor.

Hence, we'll conclude that they'll meet after 60 days.

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