Answer:
The elves need to make 120 more gifts.
Step-by-step explanation:
First you need to multiply 200 by .40 which gives you 80. 80 is the number of gifts the elves have made so far, so next you need subtract 80 from 200 (200-80) which gives you the answer of 120 gifts the elves have left to make.
4 balls = 344
7 balls = 7×344/4= 602
Given :
add 2 to both sides
Therefore :
See explanation.
Common factor: y