To find out how much money it will cost Lucy to buy 20 balls of yarn, we need to first determine the cost of one ball of yarn.
We can create a proportion using the information given:
2 balls of yarn cost $7
So, 1 ball of yarn would cost $7/2 = $3.50
Now we can find out the total cost of buying 20 balls of yarn:
20 balls of yarn * $3.50 per ball = $<<20*3.5=70>>70
Therefore, it will cost Lucy $70 to buy 20 balls of yarn to finish the blanket.
The answer is C. $70
how do I add up the money cost of everything
Lucy is knitting a blanket and needs to buy some more yarn. At her local craft store, 2 balls of yarn cost $7 and 8 balls of yarn cost $28. If Lucy needs 20 balls of yarn to finish the blanket, how much money will it cost?
A.
$49
B.
$56
C.
$70
D.
$140
1 answer