By the end of the year, terry had passed 60% of his science tests. if terry failed 8 test, how many did he pass?

let the total no. of test be x.

so, no. of test he passed=x-8

again,

he had passed 60% of total test,

i.e. 60% of x=x-8

or, 60/100 × x=x-8

or, 0.6× x=x-8

or, 0.4x=8

or, x=20

therefore, Terry had passed 20-8=12 tests.

i dont know answer:

step-by-step explanation:

i believe it is c.y = 9x

rise over run. 9 units up over 1 unit right or 9/1