Answer:
<em>2n - 7</em>
Step-by-step explanation:
To get the sum you would combine like terms.
So:
n + n= 2n
7 + -14 = 7 - 14 = -7
Put it together:
2n - 7
9) 28
10) 22
collinear means on the same line
9 ) AB+BC=AC
16+12=28
10) 13+9=22
$3.68 underbudget
Hope this helped!
