What is f(x)=-0.25(x-4)(x+6) in STANDARD AND VERTEX form??
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The volume of a sphere is increased by 6%. calculate the corresponding percentage increased in it area.

Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15

Boris needs to buy plastic spoons. brand a has a box 42 spoons for $2.37. brand b has a box of 72 spoons for $3.57. find the unit price for each brand. then state which brand is the better buy based on the unit price. round your answer to the nearest cent.