Solve for x.
2x + 20 2x - 4
X=
= [?]

Write a corresponding real world problem to represent 2x - 125=400

In an improper fraction, is the numerator equal to, less than, or greater than the denominator

Aparticular telephone number is used to receive both voice calls and fax messages. suppose that 25% of the incoming calls involve fax messages, and consider a sample of 25 incoming calls. (a) what is the expected number of calls among the 25 that involve a fax message?