find the perimeter of a triangular garden whose length are 15m, 20.5m and 17.5m also it's semi perimeter​

If f(x)= 3x+6 which of the following is the inverse of f(x)

Amira is painting a rectangular banner 2 1/4 yards wide. the banner will have a blue background. amira has enough paint to cover 1 1/2 square yards of the wall. the school colors are blue and yellow, so amira wants to add yellow rectangles on the left and right sides of the blue rectangle. the yellow rectangles will each be 3/4 yards wide and the same height as the blue rectangle. what will be the total area of the two yellow rectangles?

Afamily went out to dinner and their bill was $113.if they want to leave a 19% tip, how much should they leave.