If the sol'ns are -9 and 9, then we can use this to form our eq'n:
(x - 9)(x + 9) = 0
x^2 - 81 = 0
so...
x^2 + z - 103 = x^2 -81
z - 103 = -81
z = -81 + 103
z = 22
130 ÷ 2 = 65
Check it to make sure.
2 × 65 = 130
65 and 2 can be multiplied to get 130.
Answer:
x=19º
x+9=28º
7x=133º
Step-by-step explanation:
x+9+x+7x=180
9x+9=180
9x=180-9
9x=171
x=19
Answer:
None
Step-by-step explanation:
The information is already enough to prove that the triangles are congruent.
