Lisa is 2 cm taller than fred.
if fred's height is f cm, then lisa's height is .

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

Me. i can't figure out this question. give an explanation too. .

Given the diagram below, michael writes, "segment ac is congruent to segment ac." which of the following reasons allow him to write this statement?