Richard and Teo have a combined age of 30. Richard is 3 years older than twice Teo's age. How old are Richard and Teo?
2 answers:
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Answer:
Step-by-step explanation:
Given: , solve for
To solve for x, we need to isolate it on one side of the equal sign algebraically. In this case, since is being multiplied by
and
we can divide both sides by
and
to isolate
f(x)=x²-1
g(x)=2x-3
f(x)*g(x)=(x²-1)*(2x-3)-----------> <span>this function exists for all real numbers</span>
the answer is the interval (-∞,∞)
using a graph tool see the attached figure
