Definition: the line perpendicular to a surface Example: Line CD in the image is this for a snell's law problem

5x+40

5(x + 8)

7x - 49

7(x - 7)

18x + 9

9(2x + 1)

15x - 10

5(3x - 2)

step-by-step explanation:

for number one all you have to do is factor 5 out of 5x + 40

for number 2 factor 7 out of 7x - 49

for number three factor 9 out of 18x + 9

for number four factor 5 out of 15x - 10

he answer is x=1x3 because x=1 to x=3

the absolute value function

the formula of a midpoint between a abd b: