How many hundreds need to be taken away from 1 to leave four tenths

Solve |x| > -9 a) {x|x< -9 or x> 9} b) all reals c) no solution

The vertices of a triangle are a(7,5), b(4,2), c(9,2). what is m

The random variable x represents the number of phone calls an author receives in a day, and it has a poisson distribution with a mean of 8.7 calls. what are the possible values of x