The perimeter of a rectangle is 40 cm. The length is 14 cm. Let x = width of the rectangle Ravi says he can find the width using the equation 2( x + 14) = 40 Fran says she can find the width using the equation 2x + 28 = 40 Answer the the questions to solve the equations and to compare the steps and solutions 4. Which of these is the most helpful first step for solving Fran’s equation, 2x + 28 = 40?

1.Multiply both sides by 2

2.Subtract 28 from both sides

3.Divide both sides by 2

4.Add 28 to both sides

Brittany has designed four different birdcages, each with the same volume: a square pyramid, a cylinder, a cone, and a sphere. the zoo wants to use one of brittany’s designs but plans to change the volume of the cage. find the design change that would result in the birdcage with the greatest volume. a.) increase the area of the base of the square pyramid by a factor of ten. b.) increase the height of the cylinder by a factor of ten. c.) increase the radius of the cone by a factor of ten. d.) increase the radius of a sphere by a factor of ten.