Easy, 12-8=4+3=7+5=12 So, he had 12 books before last week
Answer:
1075 feet
Step-by-step explanation:
5 1/2 cups
2.75 times 2
y=50x
distance = 50 times the laps
100= 50 x 2
200 = 50 x 4
250= 50 x 5
400 = 50 x 8