Use the substitution method to solve the system of equations. 5x+2y=1 Y=-x+2
2 answers:
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Answer:
Step-by-step explanation:
First, extract the greatest common factor of the numerical as well as the variable parts:
the GCF of 5 and 80 is "5", and the GCF between and
is
, then:
Now, we can re-write the binomial in parenthesis as a difference o squares to be able to factor out even further:
we now repeat the process for the binomial difference:
So finally the complete factorization is:
Answer:
Domain of y=: is x>=1
Interval notation: [1,∞)
Step-by-step explanation:
We have y=
1) The domain of a function is the set of x values for which the function is real and defined.
2) So, x-1 should be positive means x-1>=0, because fourth root of any negative value would be a complex number and not a real number.
3) Now we solve the inequality x-1>=0
4) Adding 1 to both sides of the inequality we get,
x-1+1 > = 0+1
5) Cancel out -1 and +1 from the left side
6) We get x>=1
It concludes that for the domain of the given function, the x value must be greater than or equal to 1