Please help with this problem thanks

What is the vertex form of f(x) = x2 + 6x + 3

What is the length of the unknown leg in the right triangle ?

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