In 1990, the population of a town was about 5,000 people. Each year for the next 10 years the population increased by about 500
2 answers:
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Answer:
All real numbers except .
Step-by-step explanation:
The given function is
This is a rational function.
The domain of a rational function is all real numbers except values that will make the denominator zero.
The denominator of the given function is .
So the domain is all real numbers except
We solve for to obtain,
or
.
Therefore the domain is all real numbers except .
Answer:
Hari is 20; Harry is 28
Step-by-step explanation:
The ratio in 4 years is equivalent to the ratio 6:8, which has each of the original ratio unit numbers increased by 1. That means each of those ratio units stands for 4 years, and the present ages are ...
Hari: 5·4 = 20
Harry: 7·4 = 28
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<em>Conventional method of solution</em>
If you like, you can write equations for the ages of Hari (x) and Harry (y):
x/y = 5/7
(x+4)/(y+4) = 3/4
These can be solved a variety of ways. For some methods, it may be useful to write them in standard form:
- 7x -5y = 0
- 4x -3y = -4
These have solution (x, y) = (20, 28).
