Two and a half times six

Simplify sin (2x+7y) + sin (2x-7y)

Four numbers have a median of 4, a mean of 5 and a range of 9. The numbers are not integers. What could they be?

How do you write a unit rate for this situation? $28 saved in 4 weeks

Solve the system by linear combination. Show all your work. 9x+5y=35 -2x-5y=0

You have a $25 gift card for a bagel shop. A bagel cost $1.25 write a equation that gives the amount (in dollars) that remains on the card as a function of the total number of bagels you have purchased so far.

The displacement, d, in millimeters of a tuning fork as a function of time, t, in seconds can be modeled with the equation d = 0.6 sin (3520rt). What is the frequency of the tuning fork? A, 1/3520 Hz B. 1/1760 Hz C. 1760 Hz D. 3520 Hz

4x-10y=-16 and - 7x+20y=23 elimination

At the beginning of the year 2002, Sarah put $250 in a savings account. The bank agrees to pay Sarah 3% interest on her total savings at the end of each year including the interest added to the account.

The length of a rectangle is 3 inches more than its width. If the length and width are each increased by 2 inches, the perimeter of the rectangle becomes 66 inches. If x is the width of the rectangle, find its length and width.

A loan of $1000 is to be paid back, with interest, at the end of 1 year. Aft er 3 months, a partial payment of $300 is made. Use the US Rule to determine the balance due at the end of one year, considering the partial payment.