Carl invests $1, partly in a secure gic at 5% and the rest in a mutual fund that he thinks will earn 7.5%.
if he expects to earn the same amount of interest in both, how much did he invest at each rate?

0.05(x) = 0.075(10,000 - x)

the equation for interest is interest=(principle)(rate)(time)

the time for both are the same, so it cancels

assuming you mean addition: addition and subtraction are reverse operations.

step-by-step explanation:

the answer is a

step-by-step explanation:

because if you put 1 in to the square root of x it equals 300.