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3 years ago

Multiplicative Inverse Property 2 · a = 1 use the property

Mathematics

1 answer:

Korvikt [17]3 years ago

7 0

Answer:

If you write a number as a fraction, that number's reciprocal is a fraction with the numerator and the denominator switched around. For example, the reciprocal of

. Some general rules to keep in mind:

-If the fraction has a

in the numerator, the reciprocal is undefined.

-If the fraction has a

in the denominator, the fraction itself is undefined. Thus it can't have a reciprocal.

-Any other fraction has exactly one reciprocal.

Finally, the reciprocal of a reciprocal is the original fraction. This means if you flip a fraction's numerator and denominator, and then flip them back, you get the number you started with.

Step-by-step explanation:

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a father is now 38 years older than his son. Ten years ago he was twice as old as his son. let x represent the age of the son no

Helga [31]

The present age of father is 86 years old and present age of son is 48 years old

Solution:

Given that, a father is now 38 years older than his son

Ten years ago he was twice as old as his son

Let "x" be the age of son now

Therefore, from given,

Father age now = 38 + age of son now

Father age now = 38 + x

Ten years ago he was twice as old as his son

Age of son ten years ago = age of son now - 10

Age of son ten years ago = x - 10

Age of father ten years ago = 38 + x - 10

Then we get,

Age of father ten years ago = twice the age of son ten years ago

38 + x - 10 = 2(x - 10)

28 + x = 2x - 20

2x - x = 28 + 20

x = 48

Thus son age now is 48 years old

Father age now = x + 38 = 48 + 38 = 86

Thus present age of father is 86 years old and present age of son is 48 years old

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3 years ago

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4 years ago

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4 years ago

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Answer:

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Step-by-step explanation:

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3 years ago