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
Tju [1.3M]
3 years ago
9

I have $25 all in nickels and dimes. There are twice as many Nickles as dimes. How many of each are there?

Mathematics
1 answer:
Mama L [17]3 years ago
7 0

Answer:

N=250

Step-by-step explanation:

 "twice as many nickels as dimes"     means    N =2D     [eq1]

 "collection of nickels and dimes is worth $25"    means

        5N + 10D = 2500      [eq2]

   (To avoid using decimal points, PLZ express everything in cents.)

Substitution   (substitute N from eq1 into eq2]:

     5(2D) + 10D = 2500

      10D + 10D = 2500

          20D = 2500

            D = 125

      N=2D         [eq1 again]

      N=2(125)

      N=250

Check:

  Is   5(250) + 10(125) = 2500   ?

        1250 +  1250 = 2500   ?

          2500 = 2500   ?yes

You might be interested in
7300 dollars is placed in an account with an annual interest rate of 7.75%. To the nearest tenth of a year, how long will it tak
ryzh [129]
It will take 55 years for the account value to reach 38200 dollars.
4 0
3 years ago
A number plus 18 is less than 28
andrezito [222]
Written as an inequality- x+18<28
8 0
3 years ago
Read 2 more answers
Plz help me. first to answer get brainliest
laiz [17]

Answer:

A 28 because 7 times four

Step-by-step explanation:

4 0
3 years ago
A man who is 6 feet tall casts a shadow that is 11 feet long. At the same time, a tree casts a shadow that is 33 feet long. What
Rina8888 [55]

Set up a proportion:

6 feet over 11 feet long equals x feet over 33 feet long

6/11 = x/33

198 = 11x

x = 18

The height of the tree is 18 feet tall

8 0
3 years ago
Read 2 more answers
The sum of eight times a number and fifteen is seven
asambeis [7]
8x+15=7

In the statement the phrase the sum of can tell you that it is going to be an addition problem. So 8x ( eight times a number) would be added to the 15, 8x+15. Since its an addition problem the part where it says ' ... is seven', you know that it will all equal 7. So the answer would be 8x+15=7.
3 0
3 years ago
Other questions:
  • Given: segment PT || segment QS, segment PT ≅ segment QS, ∠T ≅ ∠S<br> Prove: ΔPQT ≅ ΔQRS
    12·1 answer
  • If each tire costs $58.49 and if we estimate the cost of 4 tires. how much would it cost. A.$180.
    6·1 answer
  • What is the ratio of the number of steps to the number of minutes?
    15·1 answer
  • Which value of y makes the equation true. 72=y over6
    10·1 answer
  • Find the factored form of 13x+x^2=0
    5·1 answer
  • Could you help me with this. <br><br> Express in simplest radical form.<br> 162<br><br> ​
    8·1 answer
  • 1.4-5.6(3.4-5x)=10.24 i need help
    10·1 answer
  • _____ data are information about people, places, and things that can be measured with numbers.
    13·1 answer
  • The point (-3,1) is moved 3 places in the negative y direction and 2 places in the positive x direction.
    12·1 answer
  • Find cos 200 with answers<br>​
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!