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
sergiy2304 [10]
3 years ago
12

A sum of money amounting to $4.15 consists of dimes and quarters. If there are 28

Mathematics
1 answer:
anastassius [24]3 years ago
3 0

Answer:

there are 9 quarters and 19 dimes

Step-by-step explanation:

Let x be the number of dimes and y the number of quarters

-dimes: 0.1x

-quarters: 0.25y

-the total amount of coins : x + y = 28  

=> x = 28 - y

We have the equation:

0.25y + 0.1x = 4.15

0.25y + 0.1(28 - y) = 4.15

0.25y + 2.8 - 0.1y = 4.15

0.15y = 1.35

y = 9

x = 28 - y

  = 28 - 9

  = 19

You might be interested in
Given the line q and r are parallel lines and m <3=123 find other angle measure
alekssr [168]

.............................. us to be a good day at work and I don't know what to do it again and again and again and again and again and again and again and again

7 0
3 years ago
A *blank* triangle has no congruent sids
Greeley [361]

A scalene triangle.

3 0
3 years ago
A 5.00 L air sample has a pressure of 107 kPa at a temperature of -50C. If the temperature is raised to 102C and the volume expa
joja [24]

Answer:

129.9 kPa

Step-by-step explanation:

The relationship between temperature T, volume V and pressure P is given by the ideal gas equation which is given as

K = PV/T where K is a constant such that were there is a change of temperature T₁, volume V₁ and pressure P₁ to  temperature T₂, volume V₂ and pressure P₂ then the relationship may be given

P₁V₁/T₁ = P₂V₂/T₂

where T is measured in ⁰K

T₁ = -50 + 273

= 223 ⁰K

T₂ = 102 + 273

= 379 ⁰K

5 × 107/223  = P₂ × 7/379

P₂ = 129.9 kPa

7 0
3 years ago
Please help me quickly the question is on the image <br><br>​
Paul [167]
I’m not 100% sure but I think it’s y=5x+20
8 0
3 years ago
Y is between points p and b. pt= 15 and tb = 10. what is pb
Kruka [31]
PT = 15, and TB = 10 

Take the 15 from PT, and add the 10 from TB. Which equals 25. 

PB = 25 

So, 25 is your answer. 

Hope this helps! ☺
4 0
3 years ago
Other questions:
  • Which of the following consists of a single element or type of compound?
    12·2 answers
  • A student brought two juice pouches for $1.25 each and 3 bags of chips. The total cost was $5.05. Write and solve an equation to
    8·1 answer
  • In the kite , AK=9 , JK=15 , and AM=16 .
    14·1 answer
  • Anna and Belle are asked to solve −2x − 15 = 6x + 9. Identify where one of them made an error.
    15·1 answer
  • Which of the following expression(s) are fourth-degree trinomials? Select all that apply.
    5·1 answer
  • How do you factor 450 a2 +242c2 + 660ac​
    10·1 answer
  • What is the gcf of 25, 35 and 45
    13·1 answer
  • Diana's spends 0. 8 hours per day at the pool if she goes to the pool for two days one week how many total hours does Diana spen
    5·1 answer
  • True or false the messure of an obtuse angle is greater than the measure of a right angle
    11·1 answer
  • (2x-3)^2=9 factorise
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!