A) 6x + 4x - 6 = 24 + 9x
10x - 9x = 24 + 6
x = 30
b) 25 - 4x = 15 - 3x + 10 - x
25 - 4x = 25 - 4x
Infinite Solutions.
c) 4x + 8 = 2x + 7 + 2x - 20
4x - 4x = 7 - 20 - 8
0 = - 22
No solution
D, 8 to 12
A, B, and C are all equivalent.
Answer:
3
Step-by-step explanation:
Hello,

Step-by-step explanation:
Since the x-intercepts are -20 and 40, the line of symmetry is x = (-20 + 40)/2 = 10.
Now we have y = a(x - 10)² + 30, where a is an unknown constant. We can find a by using an x-intercept point.
=> (0) = a[(40) - 10]² + 30
=> 900a + 30 = 0, a = -1/30.
Hence the rule is y = -(x - 10)²/30 + 30.