4. Find all the solutions to each equation.
x2=81
x2=100
x=12

x2=81    x=9 and x=-9

x2=100  x=10 and x=-10

x=12      nothing you can solve for in this equation. X=12

Step-by-step explanation:

x2=81

Divide 81 by 2 and get x by it self

x2=100

Divide 100 by 2 and get x by it self

step-by-step explanation:

0

look at the picture.

y-intercept for the function on a picture is 4 → point (0, 4).

y-intercept for the function

is for x = 0. substitute:

y-intercept is 8 → point (0, 8).