You could divide 5 in half and then add that to the five to find the amount of flour to use in a triple recipe. Hope this helps.
Plug in the -1 inside the given equation:
y=2x²-5x+9-78-38-18-1
y=2(-1)²-5(-1)-126= -119
Set up a proportion.
12 cupcakes/ 0.5 hrs= 144 cupcakes/ x hrs
12*12=144
0.5*12=6=x
Final answer: 6 hrs
-2.5 because a positives opposite is a negative.
7: C Because if you attempt to rotate the paper(Which you really can't) you'll see the 7 cubed one
8: I Part of the square pyramid isn't really a trapezoid
