AREA OF A CIRCLE HELP PLS​

Which expressions are equivalent to -6 + 3m

You are remodeling your kitchen. you’ve contacted two tiling companies who gladly told you how long it took their workers to tile of a similar size jim completed half the floor in 8 hours. pete completed half of the other floor in 7 hours. if pete can lay 20 more tiles per hour than jim, at what rate can jim lay tiles

Evaluate the expression for the given value of the variable 2×(c2-5) for c=4