Answer:
The third one (parabola)
Step-by-step explanation:
Do a vertical line test.
Basically draw vertical lines over the function. If the x-value has more than one y-value then it is a relation and not a function
Answer:
<h2>x < -9</h2>
Step-by-step explanation:

x=7 or x=-6
Let's solve your equation step-by-step.
0.25x2−0.25x−10.5=0
For this equation: a=0.25, b=-0.25, c=-10.5
0.25x2+−0.25x+−10.5=0
Step 1: Use quadratic formula with a=0.25, b=-0.25, c=-10.5.
x=
−b±√b2−4ac
2a
x=
−(−0.25)±√(−0.25)2−4(0.25)(−10.5)
2(0.25)
x=
0.25±√10.5625
0.5
x=7,−6
Answer:
he has to pick the phone up 100 more times
The answer is 5 because 10 minus 5 is 5, so the difference is 5.