.85x=10.2
your answer is x = 12
-2.75 describes the best.
Answer:
da te
Step-by-step explanation:
Answer:
x
−
y
+
4
=
8
7
x
+
y
=
03
x
+
4y
=
−
5
Step-by-step explanation:
The fact that the coefficients are pairwise identical (except for sign) tells you that x^2 -1 is a factor (and x-5 is the other factor). Of course, you recognize x^2-1 as a special form (the difference of squares) that is factored as (x +1)(x -1).
The zeros are x = -1, +1, +5.
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A graphing calculator confirms this.