Does anyone know the answers to differences between treatments quiz? 1. which of the following situations describes data from two separate populations

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

Jonathan can type 20 documents in 40 minutes ,and susan can type it in 30 minutes and jack can type it in 24 minutes working together ,how much time will it is take them type the same document