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3 years ago

15

In 4 years time a mother will be three times as old as her son. Four years ago she was five times as old as her son. Find their

present ages.

1 answer:

borishaifa [10]3 years ago

4 0

Son is 12, mother is 44

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Please help! the questions are in the photo.

Paha777 [63]

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2 years ago

What times what equals 81

defon

Besides the obvious one(81*1), the only 2 combinations are 9 and 9, or 27 and 3.

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2 years ago

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the length of a pool 2 km long is represented on a map with a length of 20cm. what is the map scale used?

goldenfox [79]

Answer:

The scale used is 1: 10,000 cm.

Step-by-step explanation:

Given that the length of a pool 2 km long is represented on a map with a length of 20cm, to determine what is the map scale used the following calculation must be performed:

2 km = 2,000 m

1m = 100cm

2,000 x 100 = 200,000

20: 200,000

10: 100,000

1: 10,000

Thus, the scale used is 1: 10,000 cm.

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3 years ago

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Ten less than half of a number(x) is 6.

Likurg_2 [28]

Answer:

x = 32

Step-by-step explanation:

Given the following data;

Unknown number = x

Translating the word problem into an algebraic equation, we have;

$\frac {x}{2} - 10 = 6$

Lowest common denominator (LCD) = 2

We multiply all through by 2;

$2* \frac {x}{2} - 2*10 = 2*6$

$x - 20 = 12$

$x = 12 + 20$

x = 32

Therefore, the unknown number is 32.

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2 years ago

Twice the difference of a number 8 equals 5

-Dominant- [34]

Answer:

2(n-8) = 5

Step-by-step explanation:

I'm assuming that its supposed to say "a number <em>and</em> 8"

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2 years ago

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