The price of a dvd, including 5% sales tax is $21.15. what us the price of the dvd, before sales tax?

20.14

Step-by-step explanation:

21.15 - 5%(1.01) = 20.14

d) the triangle is a right triangle 60 squared +144 squared= 156 squared

step-by-step explanation:

156 squared is the hypothenuse

so 156= c

step-by-step explanation:

for exempl this   system of equations   y = x - 3

                                                                y = 2x - 5

look   the line : y = x -3     ( red)

                            the line : y = 2x -5 ( bleus)