Which value of x make the open sentence true? 2x – 3 = 15

An an average person has 6×10 by the power of two as many red blood cells as white blood cells a small sample of the blood has 7×10 by the power of three white blood cells about how many red blood cells are in the sample

Fredrick designed an experiment in which he spun a spinner 20 times and recorded the results of each spin

Which simplifys to a+ b? a-(1-b)+1 -(1-a)-b+1 (a--1) -1)+1