Answer: m=n=3
Step-by-step explanation:
Reflecting across the y=0, in other words, the x-axis, means

So, 
This gives us the system

The answer to your question is 161,000.
B, I took this test recently and got it right
Answer:
A) 1.5
B) x^2-23x+42 = (x-2)(x-21)
C) x=2, x=21
Step-by-step explanation:
a) 15 -2x / 3 = 4
15-2x = 12 (Times by three on both sides)
-2x = -3
x = -3/-2 = 3/2 = 1.5
b) x^2-23x+42
x^2-23x+42 = (x-2)(x-21)
c) x^2 -23x +42 = 0
x=2, x=21
(x-2) = 0 ⇒ x = 2
(x-21) = 0 ⇒ x = 21
Yes, a graphing calculator can produce a list of random answers