Prove that for any value of x the value of the expression (x–3)(x+7)–(x+5)(x–1) is equal to –16.

Which inequality is equivalent to -3x < -12? x < 4 , x < -4 , x > 4, x > -4

Find all the angles that satisfy the equation cos(θ)=32

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.