Afriend bought 2 boxes and 8 notebooks for school, it cost him $11 he went back to the store the same day to buy school supplies for his younger brother. he spent $11.25 on 3 boxes of pencils and 5 notebooks. how much would 7 notebooks cost?

  $5.25

Step-by-step explanation:

If the friend tripled the first purchase and subtracted twice the second purchase, he would have the cost of 3·8-2·5 = 14 notebooks. 7 notebooks would cost half that amount:

  (3·$11 -2·11.25)/2 = $5.25 . . . . . cost of 7 notebooks

95.03 is the answer. hope this !

step-by-step explanation:

no, her answer is not correct.   we square the lengths of all sides and then determine whether the pythagorean theorem holds here:

9² + 15² = 306.   this is not equal to the square of the longest side ( that square being 395.   answer c is correct.