Complete the square to re-write the trinomial below in vertex form:
x^2+2x+1

Ax²+bx+c
when a=1, then take 1/2 of b and square it and add something

x²+2x+1
2/2=1, 1²=1
x²+2x+1-1+1
(x+1)²-1+1
(x+1)²

Answer for 2: his profit would be $2.88 explanation: you have to first multiply 72 and 0.12 together to get $8.64 once you do that you know how much money the shopkeeper made from selling the candy bars individually. so you have to do 8.64-5.76=2.88 hope that ; )answer for 3: yeah i’m sorry i have no idea what number 3 is. i’m sorry i couldn’t with that.

Ifound this on google “that means that the graph of a function with direct variation has these features: it is a straight line: because the slope is the ratio y/x = k. it passes through the origin (0,0): because y = kx = k (0) = 0.” i hope this you for what your looking for