Step-by-step explanation:
50% interest annually.
that means he gets 50% interest of the invested capital every year.
and that means he gets 50% of $70 in one year.
70 = 100%
1% = 100%/100 = 70/100 = $0.70
50% = 1%×50 = 0.7 × 50 = $35
he will earn $35 interest in one year.
as you noticed: 50% simply means 1/2 (as 100% stands for the whole).
Your answer ought to be y=-11/17x-3/17.
The result of dividing

by

is

with no remainder. Please check the step by step procedures in the picture attached.
We can conclude that:
The quotient of the division is

The remainder of the division is

The divisor is

The dividend is