7 people shake hands. Give a formula to represent the number of handshakes if n is the number of people

Brianna's family spends $220 to rent a car for 5 days. The total cost, c, of the car rental is proportional to the number of days, d, the family rents the car. a. How much does it cost, in dollars, to rent the car for one day? b.

Marshall is making fresh tomato juice. The amount of juice he can make depends on how many tomatoes he has.

The amount of simple interest accrued on a sum of money varies jointly with the amount of money, the interest rate, and the time the money is invested. A sum of money is invested at 4% for 3 years and accrues $168 in interest.

X^2 - 2x - 63 = 0 Complete the square

What is the square root of 6474657 * 5

Aidan works a different number of hours each week, depending on whether he is needed or not. For the last nine weeks, he has worked the following number of hours.

Is the inequality below sometimes, always, or never true? -2 (2x + 9) > - 4x + 9

Simplify (x - 4) (x2 + 3x + 2). x3 - x2 + 14x - 8 x3 + 7x2 - 10x - 8 x3 - x2 - 10x - 8 x3 + 7x2 + 14x - 8

Julia wrote 20 letters each month for y months in a row. Write an expression to show how many total letters Julia wrote.

X^2+4x+3 factor each polynomial