? After not studying hard enough and losing his academic scholarship, Mark needs to borrow money from 2 different banks to pay
his tuition. Bank Seven charges 12% simple interest, while First Collegiate Bank charges 10%. Mark had to borrow twice as
much from Bank Seven as he did from First Collegiate Bank. After one year, the combined interest he owed was $816. How
much did Mark borrow in total?

9514 1404 393

  $7200

Step-by-step explanation:

If x is the total amount borrowed, then 2/3x was borrowed from Bank Seven, and 1/3x was borrowed from First Collegiate Bank. The total interest owed was ...

  (2/3x)(0.12) +(1/3x)(0.10) = $816

  x(2/25 +1/30) = $816

  (17/150)x = $816

  x = $816(150/17) = $7200

Mark borrowed a total of $7200.

if a = 1,   and b = 2, then the answer is 47.99999999. if you round that to the nearest whole number, the answer is 48.