Which numbers have exactly 2 factors

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers

Solve the system of equations using the substitution method. {y=−3x+7x=−2y−16 enter your answers in the boxes.

Taber invested money in an account where interest is compounded every year.he made no withdrawals or deposits. the function a(t)=525(1+0.05)^t represent the amount of money in the account after t years. how much money did taber origanally invested?