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
Nesterboy [21]
3 years ago
15

7. Jerry has 23 coins in nickels, n, and dimes, d. He

Mathematics
1 answer:
aliya0001 [1]3 years ago
7 0

Answer:

17 nickles !

Step-by-step explanation:

First, identify the variables:

n = amount of nickels

d = amount of dimes

Next, setup the equations based on what you know.  The first equation is:

n + d = 28

For the second equation, we know that a dime is worth 10¢ and a nickel is 5¢, so it should be:

0.05n + 0.10d = 1.95

This a three-step answer:

In one formula (you can use any of them; most people use the simplest one), single out the variable on one side

Apply the first formula into the second formula, and solve it to get the value of one variable

Apply the answer from the second formula into the first formula, and solve it to get the value of the other variable

======

Step One:

n + d = 28

n + d - d = 28 - d

n = 28 - d

Step Two:

0.05n + 0.10d = 1.95

(0.05 * (28 - d)) + 0.10d = 1.95

1.40 - 0.05d + 0.10d = 1.95

1.40 + 0.05d = 1.95

1.40 - 1.40 + 0.05d = 1.95 - 1.40

0.05d = 0.55

d = 11

Step Three:

n = 28 - d

n = 28 - 11

n = 17

======

Your answer should be 17 nickels and 11 dimes.

You can double check by applying the variables into both formulas.

n + d = 28

17 + 11 = 28

28 = 28

0.05n + 0.10d = 1.95

(0.05 * 17) + (0.10 * 11) = 1.95

0.85 + 1.10 = 1.95

1.95 = 1.95

I hope this helped.

You might be interested in
Which expression is equivalent to. 3( x+6)
nata0808 [166]
I think the answer is 3x + 18 because:

3 * x = 3x
     and
3 * 6 = 18

That equals 3x + 18.

Hope this helped☺☺
8 0
3 years ago
Find the probability of rolling a prime number when a 16-sided die is rolled.
Katen [24]

Answer:

6/16

Step-by-step explanation:

On a 16 sided die there would be number as follows :

1,2,3,.. 16 The prime number out in this set of numbers are

2,3,5,7,11, and 13

There are 6 prime number so the probability of rolling a prime number is

6/16

4 0
2 years ago
Read 2 more answers
Ava is making punch for the entire class. She mixed 3 gallons of lemonade with every 7 gallons of Hawaiian Fruit Punch to make t
irina [24]

Answer:

3:7

Step-by-step explanation:

3 parts of lemonade to 7 parts punch

5 0
2 years ago
Read 2 more answers
Admission to a theme park is $32 per adult and $20 per child. In order to pay the
Harlamova29_29 [7]

Answer:

Step-by-step explanation:

Hello, your question is not mathematically solvable.

4 0
2 years ago
If you reduce the size of a triangle to a height 2 inches. If the original rectangle was 2 feet wide and 12 inches tall. What is
stealth61 [152]
4 inches wide is the answer
4 0
3 years ago
Other questions:
  • What’s in between 80 and 81
    6·1 answer
  • Ellen, a political intern, analyzes poll data for Cal Stegall, a candidate for state legislature. She notices Stegall's populari
    14·2 answers
  • The 18th sequence for a19=a-4 - d-17
    9·1 answer
  • The store buys a keyboard for $35 and sells it for $61.25. What percentage was the markup?
    10·1 answer
  • Solve for x.<br> -4(2x + 5) + 2 + 2 = -11
    9·1 answer
  • On sports day at Lakewood middle school, gold, silver, and bronze medals were awarded to the top three finishers in each event M
    10·1 answer
  • . If you ask to round 6.0865 to the nearest tenths, what process are you going to do? *
    11·1 answer
  • Can someone help me with the vertex of the parabola
    5·1 answer
  • Find the area of the regular polygon. Give the answer to the nearest tenth
    11·1 answer
  • which sequence of transformations could be used to move triangle RST so it completely covers triangle R”S”T?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!