394+12.5+49.5+39+19.95=514.95,
25.7475+514.95=540.6975
12 lessons*20=240
Grand total is 780.6975
Answer:
1.5
Step-by-step explanation:

Answer:
a
Step-by-step explanation:
Let the side of AB be x.
3/12=2/2+x
3x=18
x=6
Answer: X=6
Step-by-step explanation: