6x+7y=32 and 2x+5y=16
if you add the two equations you get the first answer and if you subtract the two equations you get the second answer
while excluding 0, the product and quotient is positive if operating between same sign, otherwise if we operating different sign will resulted negative.
45 / 2 = 22.5
You can get 22.5 hours of Internet for 45$.
For E the answer is 2. Because the square of 1 is one and 9 is three. And 2 to the square root of two which would be 2 time 2= 4