by the difference
5
so x=
and
then y=
The linear function y = 7x + 2 represents the cost y, in dollars, of buying x tickets, including a one time service fee. What do
1 answer:
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by the difference
5
so x=
and
then y=
Multiply both the numerator and denominator by , which is called the "conjugate" of
:
Why do we pick this number? Recall the difference of squares factorization:
Now replace and
. Then
So in your fraction, you end up with
Finally, just expand the product.