SOLUTION: a mathematics intructor asserted that students test grades are directly proportional to the amount of time spent studying. brent studies 15 hr. for a particular test and gets a sco

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Question 168329This question is from textbook pre-algebra
: a mathematics intructor asserted that students test grades are directly proportional to the amount of time spent studying. brent studies 15 hr. for a particular test and gets a score of 85. at this rate, what score would ha have recieved if he had studied 16hr.?
 This question is from textbook pre-algebra

Answer by Mathtut(3670) About Me  (Show Source):
You can put this solution on YOUR website!
15%2F85=16%2Fxcross multiply
15x=1360divide by 15
highlight%28x=90.66%29 score if he studied for 16 hours