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
vitfil [10]
3 years ago
12

Joanna has a total of 7 rolls of coins worth $23. She has rolls of dimes worth $5 each, and

Mathematics
1 answer:
yawa3891 [41]3 years ago
6 0

Answer:

3 rolls of dimes and 4 rolls of nickels

Step-by-step explanation:

Number of rolls of dimes = x

Number of rolls of nickels = y

Total number of rolls = 7

x + y = 7        -------------------(i)

Total amount = $ 23

5x + 2y = 23 ----------------(ii)

Multiply equation (i) by -2. So when we are adding, y will be eliminated and you will get the number of rolls of dimes.

(i)*(-2)              -2x - 2y = -14

(ii)                    <u>5x   + 2y = 23</u>    {Now add}

                       3x            = 9

x = 9/3

x = 3

Plug in the value of x in equation (i)

3 +y = 7

y = 7- 3

y = 4

You might be interested in
The sides of a rectangle are in the ratio of 4:5. If the width is 28 in., find the length, the perimeter, and the area of this r
nadezda [96]
If the width is 28 inches, then divide that by 4 and you get 7. You multiply that by 5 to get the length. That would be 35. Just to check, you know that the width 28 and length 35 are in ratio 4:5 if you divide by 7. The perimeter would be 2(35+28)=63*2=126. So the perimeter is 126. The area would be 35*28 which is 980. To sum up, the answers are as follows.

Length: 35 in
Perimeter: 126 in
Area: 980 inches squared.
5 0
3 years ago
I don’t know how to do this help :(
katen-ka-za [31]
A of trapezium = ((a+b)/2)(h)
A = ((10+10+4)/2)(8)
A = (24/2)(8)
A = 12(8)
A = 94
The area is 94ft²
5 0
3 years ago
The lines below are perpendicular. If the slope of the green line is 3/2 what is
Mars2501 [29]

Answer:

The answer: -2/3

your welcome :)

4 0
3 years ago
Two standard number cubes are thrown, one after the other. What is the probability that the first cube lands showing a 4 or grea
IgorC [24]

Answer:

the answer is a 2/3 change(when simplified) that there will be a number 4 or smaller will there is a 1/3 changed(when simplified) that it will land high than 4  

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
The length of a rectangle is 4 in longer than its width.
bija089 [108]

The area of the rectangle that has a perimeter of 44 in is calculated as: 117 in².

<h3>What is the Area and Perimeter of a Rectangle?</h3>

Area = length × width

Perimeter = 2(length + width).

Given the following:

  • Width = w in.
  • Length = w + 4 in
  • Perimeter of the rectangle = 44 in.

Therefore:

2(w + 4 + w) = 44

Solve for w

2(2w + 4) = 44

4w + 8 = 44

4w = 44 - 8

4w = 36

w = 9

Width of the rectangle = w = 9 in.

Length = w + 4 = 9 + 4 = 13 in.

Area of the rectangle = 13 × 9 = 117 in².

Learn more about the area of rectangle on:

brainly.com/question/2607596

#SPJ1

5 0
11 months ago
Other questions:
  • List all the prime numbers between 30 and 50
    5·2 answers
  • Susan can pick 4 pounds of coffee beans in an hour or gather 2 pounds of nuts. Tom can pick 2 pounds of coffee beans in an hour
    9·1 answer
  • Brainiest to whoever answers correctly
    8·1 answer
  • What is the volume of Box 3? 4x3 + 2x2 + 4x + 1 x4 + 4x3 + x2 + 4x x4 + 4x3 + 2x2 + 4x x4 + 2x3 + x2 + 4
    11·1 answer
  • A national manufacturer of ball bearings is experimenting with two different processes for producing precision ball bearings. It
    11·1 answer
  • Solve the inequality.<br> 1<br> x+5 &lt; 6<br> 2<br><br> Help me please
    13·2 answers
  • Question 5 of 10<br> Which of the following is most likely the next step in the series?<br> CO
    12·2 answers
  • Plzzz help I would really appreciate it !!!!
    14·1 answer
  • Jim sells used drones for 70% of the original manufacturer's purchase price of a new drone. Jim also sells new drones for 15% mo
    13·1 answer
  • What's the volume of a pipe that's 4 feet in diameter and 24 feet long? (Use π = 3.1416.)
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!