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
During a flu epidemic a company with 200 employees had 1/3 on Monday and another 3/10 call in sick on Tuesday.
valkas [14]

<u>Part</u><u> </u><u>(</u><u>a</u><u>)</u>

\frac{1}{10}+\frac{3}{10}=\frac{4}{10}=\boxed{\frac{2}{5}}

<u>Part</u><u> </u><u>(</u><u>b</u><u>)</u>

200\left(\frac{2}{5} \right)=\boxed{80}

6 0
2 years ago
W(x) = −3x− 4; Find w(7)
Arturiano [62]

Step-by-step explanation:

Given

w(x) = - 3x - 4

Now

w(7) = - 3 * 7 - 4

= - 21 - 4

= - 25

Hope it will help :)❤

4 0
2 years ago
If a chord of a circle is 6 and is twice as far from the center chord of length 12, how long is the radius of the circle?
Ad libitum [116K]

Answer and explanation:

A center chord in a circle is the diameter of that circle. Therefore a center chord of a circle is different from other chords that touch two points on the circle but not in the center of the circle. A diameter of a circle is the chord that runs the length of the center of the circle touching two points at the edge of the circle. A diameter is twice the radius of the circle. So if the diameter of the circle is 12cm then the radius of the circle is 6cm

5 0
3 years ago
Lily's flight is delayed for 180 minutes.<br> How many hours is this?<br> 1 hours?
Elina [12.6K]
180 minutes is 3 hours.
8 0
3 years ago
Read 2 more answers
20 POINTS
adoni [48]

Answer:

If 1 gallon = 16 cups, then 4 gallons = 64 cups. (16 x 4)

So if there are 4 gallons of water, then there are 64 cups. If 1 cup of water evaporates a minute then it will take 64 minutes for all the water to be gone.  

Answer: 64 minutes

OR

Answer: An hour and 4 minutes

Step-by-step explanation:

3 0
3 years ago
Other questions:
  • I need help with this! I'll mark Brainliest if it's correct.
    10·1 answer
  • Find the distance between (-7,-2) and (11,3)
    5·1 answer
  • Find the value of c that makes each trinomial a perfect square.<br> x^2-13x+c
    11·1 answer
  • I need this to be 20 letters so whats 2 +2
    15·1 answer
  • Help with bonus question please
    10·1 answer
  • The formula for the volume of a pyramid Is V = 1/3 Bh, where V is the volume, B is the area of the base, and h is the height of
    14·2 answers
  • Write an inequality to represent the graph.
    9·1 answer
  • Find the value of x so that f (x)=7 <br> x=
    10·1 answer
  • Please help me this is for an exam <br><br> What is the polynomial function in factored form?
    7·1 answer
  • O is the center of the regular octagon below. Find its area. Round to the nearest tenth
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!