Mary, who is sixteen years old, is four times as old as her brother. How old will Mary be when she is twice as old as her brother?

A brick of mass 8 kg hangs from the end of a spring. When the brick is at rest, the spring is stretched by 3 cm. The spring is then stretched an additional 4 cm and released. Assume there is no air resistance.

A month of the year is chosen at random. What is the probability that the month starts with the letter or the letter M? 5/24 1/6 1/4 5/12

What is the value of the expression Alco

Rita is saving up 15,000 to put a down payment on a condominium. If he starts with 8,000 saved and saves an additional $850 each month, which equation

The class of 2015 decides to start a T-shirt company. After initial expenses of $280, the purchase each t-shirt for $3.99. They sell each t-shirt for $10.99. how many must they sell to break even?

Solve for x and y 100x + 50y = 200

If tan 0 = 12/5 and cos 0 = - 5/13 then what is sin 0

Hallie has 10 times as many pages to read for her homework assignment as Janet. Altogether they have read 264 pages. How many pages does each girl have to read?

The difference of 9 and the number n is equal to 4

Suppose that a family wants to start a college fund for their child. If you can get an APR of 7.5% and want the fund to have a value of $75,000 after 18 years, how much should you deposit monthly? Assume an ordinary annuity. a. $164.98 c. $166.21 b.