Sin (20) ^2 + sin (40) ^2 + sin (60) ^2+sin (80) ^2 =

I need a non negative number anyone?

Lance bought 12 quarts of lemonade so that everyone who came to his party could have exactly 1/3 quart. How many people did Lance invite to his party?

The Jones drove 108 miles on 4 gallons of gas to the amusement park. At this rate how many miles can they drive on 6 gallons of gas?

6x - 8; 2 (3x - 5) are they equivalent?

A digital camera is on sale for 20% off the regular price of $599. After the price reduction, a 6.5% sales tax is added. How much will the customer pay?

Kenya bought 28 beads and nancy bought 25 beads. It takes 35 beads to make a necklace. Write and solve two addition equations to find how many more beads they each need to make a necklace

How to find the vortex

Assume that the candle manufacturer has 4 types of round candles and 8 types of square candles available, and a gift set consists of 3 round and 3 square candles. How many different gift packages are possible?

Which of the following expressions is equivalent to - 9? A. 63 : 7 B. - 63 : 7 C. - 7 : 63 D. - 63 : (-7)

What's the Lcm of 6 and 10