X = 4 and x = 6
The zeros of a quadratic function are when the parabola crosses the x axis.
Here it crosses the x axis at x=4 and x=6
Answer:
D.
Step-by-step explanation:
A is linear, you can figure out that y=x+5
B is linear, y=22(x+1)
C is linear, y=8x+5
D is exponential, y=3ˣ⁺¹
Deriving these formulas is a matter of trial and error if you know you can choose between linear and exponential.
2x+34 = 4(x+5)
2x+34 = 4x+20
-2x = - 14
x = 7
First solve the inequality:
(2/3)x +3< -2x-7
(8/3)x< -10
x< -30/8
x<-15/4 or x< -3.75
now look for the answers which satisfy this, and the answer will be D
The first is equal, but the second is not. Hope this helps!
