Option 1: $120
Option 2: $155
Option 3: $130
Option 4: $135
So B. Option 1 is the better purchase
1) You add 72+89 which you get 161 and you divide by two and you get 80.5
2) you do the same thing 72+89+90=251
And you divide by three and you get ≈83.66
If you are talking about a mixed number it would be 12 87/100 if you mean a fraction it is 1287/100
Let’s put the second equation on top
3x + 4y = 1
-3x + 2y = -13
I’m subtracting the first eqautionfrom the second
2y = 14
Y= 7
Plug in 7 for y in either of the original equations
3x + 28 = 1
3x = -27
X= -9
The answer is (-9,7)
