16 book marks has been sold
Answer:
9r
Step-by-step explanation:
1.5r - 3r + 10.5r
10.5r + 1.5r = 12r
12r - 3r = 9r
Final Answer = 9r
2nd and 4th on edg
3+21pi / 2 +4
3-21pi / 2 -4
x²+6x+9=(x+3)²
