Factor the expression over the complex numbers. y^2+49

Write a numerical expression that satisfies all of the following conditions. 1.)the only number used in the expression is 5 2.)at least one exponent other than 1 is used 3.)when the expression is evaluated, the answer is greater than 40 and less than 50

What are “like terms”? why can we only add like terms?

What is the difference between the predicted value and the actual value