Answer:
inches: 0 and 7
Step-by-step explanation:
because you are subtracting by 1
Im pretty sure it can. 20 +20 = 40. if that helps...
2 rows of 18 chairs are blue so that is 36 chairs. then 4 rows of 12 chairs are blue so that is 48 chairs 36 plus 48 is 84 total blue chairs