Roger has $2, $1 and 50 cent pieces in the ratio of 5:4:2. If 30 of roger’s coins are 50 cent pieces, how many $2 coins and $1 coins does roger have after buying a $1 sundae from Maccas? Need help asap!! I don’t understand!!

Answer:Step-by-step explanation:So the ratio is 5:4:2there are 11 parts to this ratio (5+4+2)the 5 is for the $2, the 4 is for the $1 and the 2 is for the 50 centshe has 30 of the 50 centsso you divide 30 by 2 to get one part of this ratio1 part of this ratio is equal to 15 coinsmultiply 15 by 5 to get the number of $2 coins: 75multiply 15 by 4 to get the number of $1 coins: 60add all of those parts together 30+60+75 = 165If he uses a $1 coin to buy the sundae he will have 75 $2 coins and 59 $1 coins lefthowever, if he uses two 50 cents coins to buy the sundae he will have 75 $2 coins and 60 $1 coins left