Prove that if x^3 is irrational and x >=0 then the square root of x is irrational.

What is the common difference in the following arithmetic sequence 7,3,-1,-5

Which expression demonstrates the use of the commutative property of addition in the first step of simplifying the expression (-1+i)+(21+5i)+0

One cell phone plan charges $20 per month plus $0.15 per minute used. a second cell phone plan charges $35 per month plus $0.10 per minute used. write and solve an equation to find the number of minutes you must talk to have the same cost for both calling plans.