Find the output when the input x is 7

You are living in aldine, tx and you are planning a trip to six flags in arlington, tx. you look on a map that has a scale of 0.5 inches to 30 miles. if the map shows the scale distance from aldine to arlington is 4 inches, how far is the actual distance?

Find the derivative of the function

Three lines meet at a point. set up and solve an equation to find the value of (a) is your answer reasonable? explain how you know