Suppose a, b, c, and d are different positive integers whose sum is 100, and a-c=5. what is the greatest possible value of ab-cd?

If f(x)=x^3 and g(x)=2x+7 when g(x)=-5

Tim's phone service charges $23.06 plus an additional $0.22 for each text message sent per month. if tim's phone bill was $28.56, which equation could be used to find how many text messages, x, tim sent last month?

Big boi and travis scott are performing at the super bowl. travis scott is 62 years younger than twice big boi’s age. the sum of their ages is 70 years old. use b to represent big boi’s age. write and solve an equation.