1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
OlgaM077 [116]
3 years ago
15

Mr.marichal has quarters ,dimes,and pennies in a jar.he has twice as many quarters as oennies.he also has 5 more dimes than penn

ies.the total value of the coins is $6.60.how many of each type of coin does he have
Mathematics
1 answer:
liberstina [14]3 years ago
5 0

He has 20 quarters, 15 dimes and 10 pennies.

Step-by-step explanation:

Let,

Quarters = x

Dimes = y

Pennies = z

We know that,

A quarter is 25 cents, dime is 10 cents and penny is 1 cent.

Total amount = $6.60 = 6.60*100 = 660 cents

According to given statement;

25x+10y+z=660   Eqn 1

x=2z    Eqn 2

y=z+5   Eqn 3

Putting these values of x and y in Eqn 1

25(2z)+10(z+5)+z=660\\50z+10z+50+z=660\\61z=660-50\\61z=610\\

Dividing both sides by 61;

\frac{61z}{61}=\frac{610}{61}\\z=10

Putting z=10 in Eqn 2

x=2(10)\\x=20

Putting z=10 in Eqn 3

y=10+5\\y=15

He has 20 quarters, 15 dimes and 10 pennies.

Keywords: linear equations, substitution method

Learn more about linear equations at:

  • brainly.com/question/10978575
  • brainly.com/question/11025333

#LearnwithBrainly

You might be interested in
God loves you!!!!!!!!!
jok3333 [9.3K]

Answer:

thank you ^-^

Step-by-step explanation:

you too :)

4 0
3 years ago
Read 2 more answers
At a track samma finished the 200m race in 25.98 seconds.Tom finished the 100 meters race in 12.58 seconds.Which runner ran at t
d1i1m1o1n [39]

Answer:

tom

Step-by-step explanation:

if you look at samma's rate you can easily find that she was much slower

6 0
3 years ago
2/3 * (-3) h SD j ni djndjifnr​
Eddi Din [679]
2/3 x (-3)
-2/3 x3
= -2
5 0
3 years ago
Please Help!!!!!! Using the rest of my points for this!
navik [9.2K]

It’s the first one on the top left corner

7 0
3 years ago
Read 2 more answers
I know the answer is A....but why?
katrin2010 [14]

Answer:a

Step-by-step explanation:

throughout the table it is presented that the answer, A, is correct becuase within the percentages is is obvious that a is correct.

6 0
3 years ago
Read 2 more answers
Other questions:
  • Help, in geometry please?<br><br>Thank you!
    5·1 answer
  • Someone answer this please
    12·1 answer
  • Answer please thx so much
    10·2 answers
  • $13:50 to 6 pounds what the ratio
    14·1 answer
  • Can someone please explain functions and how find the y intercept when in this form
    12·1 answer
  • What is the total cost to the nearest cent $58 20% tip
    9·1 answer
  • Need help with these 2 questions pls help me will mark brainiest
    7·2 answers
  • A chemist is using 358 milliliters of a solution of acid and water. If 13.5% of the solution is acid, how many milliliters of ac
    10·1 answer
  • Please help me on my math problems screenshots are below
    10·1 answer
  • your monthly finance charge is based on your interest rate and your balance, the higher your interest, the higher your finance w
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!