Y=10 and 3x+2y=3
X=-3 is NOT a function because it has multiple y values for one x value.
Y equals ten is a horizontal line, and passes the vertical line test, as does the third equation
-11-8=-19
-17-10=-27
slope=19/27
Let x be the number.
"twelve decreased by twice a number" ---> 12 - 2x
"8 times the sum of number and 4" ---> 8(x + 4)
12 - 2x = 8(x + 4)
12 - 2x = 8x + 32 (distributive property)
12 = 10x + 32 (add 2x to both sides)
-20 = 10x (subtract 32 from both sides)
x = -2 (divide both sides by 10)
