John has a gift card with a $26.61 balance. He wants to purchase songs on Itunes each song cost $1.29. He wants to keep $10 on the card for future use. How many songs can he buy

12

Step-by-step explanation:

11 songs

Step-by-step explanation:

11 songs would leave him with $10.30 left

the formula of a slope:

from a table we have

substitute:

the slope of f(x) is -1.

the graph of funcfion g(x) is a horizontal line. the slope of a horizontal line is equal 0. therefore the slope of g(x) is 0.

-1 < 0

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)