Bob purchased a bus pass card with 320 points. each week costs 20 points for unlimited bus rides. the graph shows the points remaining on the card over time in weeks. determine the value of f(10), and explain what it represents.

The value of f(10) is 120 points.

Step-by-step explanation:

Given,

Total points = 320,

The points spent in a week = 20,

So, the points spent in x weeks = 20x,

Thus, the remaining points ( say f(x) ) = Total points - points spent in m weeks

f(x) = 320 - 20x

If x = 10,

The remaining points after 10 weeks,

f(10) = 320 - 20(10) = 320 - 200 = 120 points

b

step-by-step explanation:

a difference is the result of subtraction. while each of these expressions has subtraction in it, a difference will be the result when subtraction is the last operation applied in the order of operations for the expression. this means subtraction must be outside of the parenthesis. only b has this.

a c

step-by-step explanation: