A teacher wrote the following set of numbers on the board: a = √20 b = 2.5 c = √225 Explain why a + b is irrational and b + c is rational.

The following frequency table relates the weekly sales of bicycles at a given store over a 42-week period.value01234567frequency367108521(a) in how many weeks were at least 2 bikes sold? (b) in how many weeks were at least 5 bikes sold? (c) in how many weeks were an even number of bikes sold?

What happens to the area as the sliders are adjusted? what do you think the formula for the area of a triangle is divided by 2?

With both problems. a.s.a.p directions on photo ^