To prepare for a marathon run Sue ran 16 miles before she blistered her heel, and she walked 1 additional mile. Her running speed was 16 times as fast as her walking speed. She was running and walking for 4 hours. FIND Sues running speed.

  8 miles per hour

Step-by-step explanation:

Let s represent Sue's running speed in miles per hour. Then her total exercise time was ...

  time = distance/speed

  4 = (16/s) + (1/(s/16)) . . . . . using distance in miles and time in hours

  4 = 16/s +16/s = 32/s . . . . simplify

  s = 32/4 = 8 . . . . . . . . . . . multiply by s/4

Sue's running speed was 8 miles per hour.

in mathematics, a function is a relationship between two variables such that the value of one of the variables, called the dependent variable, is determined by the value of the other variable, called the independent variable. there is a specific term we use to describe the set of independent variables of a function.