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
Naily [24]
3 years ago
13

There is a jar containing 80 all of which are either quarters or die the total value of the coins is $13 how many of each coin a

re there in the jar make sure to write the Quetion social work
Mathematics
1 answer:
padilas [110]3 years ago
3 0

Answer:

There are 33 quarters and 47 dimes

Step-by-step explanation:

Let the number of quarters be q.

Let the number of dimes be d.

There are 80 coins in total. Therefore:

q + d = 80 ________(1)

The total value of coins is $13.

The value of a quarter is $0.25 and the value of a dime is $0.10. This means that:

0.25q + 0.10d = 13 _____(2)

We have a system of equations:

q + d = 80 ________(1)

0.25q + 0.10d = 13 ____(2)

From (1):

q = 80 - d

Put this in (2):

0.25(80 - d) + 0.10d = 13

20 - 0.25d + 0.10d = 13

Collecting like terms:

-0.15d = 13 - 20

-0.15d = -7

d = -7 / -0.15

d ≅ 47

Therefore:

q = 80 - 47 = 33

There are 33 quarters and 47 dimes.

You might be interested in
Three ways to write a division problem
8090 [49]
My three examples would be, 15/3, 15 then the divided by sign 3. 15 over 3 too. Hope this helps!!!
6 0
3 years ago
Read 2 more answers
Can someone please help me with this algebra
Novay_Z [31]

Answer: d

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
Find the volume of the pyramid. Write your answer as a fraction or mixed number.
tia_tia [17]

Answer:

V=lwh /3

Step-by-step explanation:

6 0
3 years ago
What is the measure of the angle
pav-90 [236]

Answer:

it's 60 degree in my thinking

Step-by-step explanation:

hope this is the answer

8 0
3 years ago
Read 2 more answers
Necesito saber que es un teorema temático!!!! es urgente
Dafna11 [192]

Answer:

Un teorema tematico o un teorema matematico?

Step-by-step explanation:

4 0
3 years ago
Other questions:
  • Jake ate 4/8 of a pizza. Millie ate 2/8 of a pizza. How much pizza was eaten by Jake and Millie? Write in the simplest form
    8·1 answer
  • What is 37% of 600? what are the steps.
    8·2 answers
  • A fair die is rolled 10 times. What is the probability that an odd number (1, 3, or 5) will occur fewer than 3 times?
    10·1 answer
  • Kyle is saving money to buy a bicycle.He has 45.50 in his savings account and saves account and saves 15% of his paper route ear
    5·2 answers
  • Find the exact sum or difrence. 7/15 + 9/15 + 4/15
    10·1 answer
  • help! A loaf of bannana bread serves 6 guests. There will be 47 guests attending the faculty breakfast. Which expression shows h
    14·1 answer
  • Points haha + Brain liest 100<br> What is 1+1+1+1=?
    5·1 answer
  • X + 35 = 5 so X + ?
    14·1 answer
  • naomi has earned $54 mowing lawns the past two days. she worked 2 1/2 hours yesterday and 4 1/4 hours today. if naomi is pains t
    9·1 answer
  • 1/2 más 1/3 es igual ​
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!