Solve the simultaneous equations:

2x+y=18

x-y=6

A strong gust of wind strikes a tall building, causing it to sway back and forth in damped harmonic motion. The frequency of the oscillation is 0.5 cycle per second, and the damping constant is c = 0.9.

What is the answer to this equation? 2x (43+12)

Approximately how many time as large was the world population as the United States population in 2014

60 prime or compisite

These girls are selling cases of popcorn to earn money for a bandtrip. In week 1emily sold 2 3/4 cases, brenda sold 4 1/4 cases and shannon 3 1/2cases how many cases did they sell in all?

What type of an association would you expect between a person's height and weight? Positive association Negative association No association Linear association

Both Wilma's and Betty's pools hold 9000 gallons of water. If Wilma's garden hose fills at a rate of 750 gallons per hour while Betty's garden hose fills at a rate of 650 gallons per hour, how much longer does it take Betty to fill her pool than

One person can do a certain job in six days, a second person can do the same job in two days, and a third person can do this job in three days. how many days will they take to do the job together?

What is the area of this circle

What is the interest earned on $12,000 invested at 5.25% simple interest for 5 years?