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
Luba_88 [7]
3 years ago
8

A purse contains a collection of quarters, dimes, nickels, and pennies. The average value of the coins in the purse is 17 cents.

If a penny is removed from the purse, the average value of the coins becomes 18 cents. How many nickels are in the purse?
Mathematics
1 answer:
bulgar [2K]3 years ago
7 0

Answer:

There are total of 17 coins in the purse

Step-by-step explanation:

Let x represent the no of coins in the purse

Let y represent the total amount

 y/x = 0.17

y = 0.17*x............................(i)

y-0.01 / x-1 = 0.18

y - 0.01 = 0.18x -0.18........(ii)

We substitute y = 0.17 x into the second equation:

0.17x - 0.01 = 0.18x - 0.18

0.17 = 0.01x

x = 17

Hence, there are total of 17 coins in the purse

You might be interested in
Un alumno multiplica un número por 32 en lugar de multiplicarlo por 23, obteniendo un producto mayor en 54 al producto original.
romanna [79]

Answer:

La suma de cifras del producto original es igual a 12.

Step-by-step explanation:

De acuerdo a la información proporcionada, si multiplicas un número "x" por 32 su resultado sería igual al producto original "y" más 54 dado que dice que se obtiene un producto mayor en 54 al producto original, lo que se puede expresar de la siguiente forma:

32x=y+54

Además, se puede inferir a partir del enunciado que si el número x se hubiera multiplicado por 23 el resultado habría sido el producto original que lo denominamos como "y", por lo que puedes decir que:

y=23x

Ahora puedes reemplazar y=23x en 32x=y+54 y despejar x:

32x=23x+54

32x-23x=54

9x=54

x=54/9

x=6

Finalmente, puedes reemplazar el valor de x en y=23x:

y=23x

y=23*6

y=138

Suma de cifras: 1+3+8 = 12

De acuerdo a esto, la respuesta es que la suma de cifras es igual a 12.

5 0
3 years ago
If line ML is a midsegment of triangle IJK, find KJ
laila [671]
So what we're dealing with here is a similar triangle situation. Since ML is a midsegment, that means that IL and LJ are congruent. So, IL=LJ=13. This means that the whole side IJ is 26 (13+13=26). We also know that triangle IML and triangle IKJ are similar triangles, so their sides are proportional. This means that we can set up the ratio:
12/13 = x/26
and solve for x.
After multiplying 26 to both sides of the equation, we find that x=24, so KJ=24.
4 0
4 years ago
Read 2 more answers
14.4% of a voters in middleville voted for rocky rufus for mayor. if 2500 people voted, how many votes did rocky get?
il63 [147K]

Answer:

360 votes

Step-by-step explanation:

Move the decimal to the left 2 times and you'll get .144. Multiply that by 2500, and you have your answer.

3 0
3 years ago
PLEASE HELP!! DUE SOON!!
Aneli [31]

Answer:

can i see a pic

Step-by-step explanation:

6 0
3 years ago
What is the equation of this line?
Mamont248 [21]
(0, -3)(2, -2)
slope = (-2 + 3)/(2-0) = 1/2

b = -3
equation
y = 1/2x - 3

answer is A
<span>y = 1/2x - 3</span>
3 0
4 years ago
Read 2 more answers
Other questions:
  • Describe the locus in space.<br><br><br> points 4 mm from a line
    13·1 answer
  • How do you solve this equation x^1/4+1=0?
    15·1 answer
  • Which algebraic expression represents the phrase “two times the quantity of a number minus 12”?
    13·2 answers
  • Write 22.056 in an expanded form
    15·2 answers
  • I need help please?!!!!!!
    6·2 answers
  • What does 0 mean in a number line
    14·1 answer
  • Solve the equation. If necessary,round your answer to the nearest tenth x2=108 a)10,4,-10.4
    12·2 answers
  • A washer and a dryer cost $1039 combined. The washer costs $89 more than the dryer. What is the cost of the dryer?
    11·2 answers
  • Simplify (3a²b²)²+(ab)²​
    7·2 answers
  • What is the gcmf of 5x^2-10x^2<br>100 points​
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!