Which expression is equivalent to 81-16x^2

What's the measure of <1 if

Common multiple of 3 and 9

2% of the student at hamlet middle school have red hair there are 700 student at hamilton middle school school

Ow much carbon dioxide will you prevent from entering the atmosphere in one year, if you replace a 100-watt light bulb with a CFL bulb that uses 30 watts in a fixture that you have on 8 hours per day?

Savannah bought two 24 packs of tim bits. she is hanging out with 4 friends. what is the greatest number of timbits each of them can get, if shared evenly. is the quotient rational or irrational? explain how you know ...

Solve: 8+4/5 (15+2x) = -12 What should we do first? Finish solving it and what do you get for x? 1. - 20 2. 5 3. - 2

382.993 rounded to the nearest hundredth?

Their sum is 7, and their product is 15

Which expression has the same value as - 18: (-9) -18:2 -12: (-3) -10:5 -8: (-4)

Jim uses ribbon for bookmarks. Jim has 9 feet of ribbon. He uses 1/3 foot of ribbon to make each bookmark. What is the total number of ribbons Jim can make from 9 feet of ribbon?