Mark has twice as many quarters as nickels and three more dimes than nickels. He has 4.20 in all. How many of each type of coin
does he have?
1 answer:
Answer:
Number of nickels = 6
number of dimes = 9
number of quarters =12
Step-by-step explanation:
Let 'q' be the number of quarters and 'n' be the number of nickels
and 'd' be the number of dimes
twice as many quarters as nickels

three more dimes than nickels.

1 nickel = 5 cents
1 dime = 10 cents
1 quarter = 25 cents
4.20 dollars = 420 cents

replace q and d in the above equation



Subtract 30 from both sides

divide both sides by 65
n=6
Number of nickels = 6
number of dimes = 
number of quarters = 
You might be interested in
3* ( 1/3 -5)= -14 hope this helps
D x= -9
Y=9
Because 4(-9)+45=9
I just put in each one and d got it right.
<span> 4 apples and 6 bananas
so ration bananas to apples = 6:4 or 3:2 or 6 4
answer is
</span><span>all of the above</span>
Answer: 10x - 25x - 35
Step-by-step explanation:
F 2x times 5x = 10x
O 2x times 5 = 10x
I -7 times 5x = -35x
L -7 times 5 = -35
Hope This Helps :)
Answer: 90,720
Step-by-step explanation: 56*54=3,024
5*6= 30
3,024*30=90,720