An amusement park charges a $20 admission fee and $3 for each ride. which equation can be used to determine c, the total cost of a day at the amusement park, based on n, the number of rides?
c = 3n + 20
n = 3c + 20
c = 20n + 3
n = 20c + 3

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Look at the figure below: triangle abc is a right triangle with angle abc equal to 90 degrees. the length of ac is 5 units and the length of ab is 4 units. d is a point above c. triangle adc is a right triangle with angle dac equal to 90 degrees and dc parallel to ab. what is the length, in units, of segment cd?

What is the slope of the line (-7,2) (4,6)