Describe a strategy to visualize and calculate 20% of 40.

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.

Solve the following simultaneous equation by using an algebraic method (either substitution or elimination) 2x + 3y=-4 4x-y=11

Frank owns a $141,000 home, for which he has a 30-year mortgage in the amount of $700 a month. once he has paid off mortgage, how much will he have paid in investment? a. $111,000 b. $109,000 c. $120,000 d. $141,000