Can you predict the out come of multiplying 750 by 0.1 without calculating? If so, how?

In the surface area formula for cylinders which expressionrepresents the lateral area

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 each equation using the quadratic formula. find the exact solutions. 6n^2 + 4n - 11