How can you classify triangles?

Angles r and s are complementary. the measure of angle r is 31 degrees. which equation can be used to find angle s?

If a sprinkler waters 1 over 12 of a lawn in 1 over 2 hour, how much time will it take to water the entire lawn? (5 points) 10 hours 6 hours 1 over 6 hour 7 over 12 hour

How many and of which kind of roots does the equation f(x)=x3−x2−x+1