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
NEED URGENT HELP!! WILL GIVE BRAINLIEST
Flauer [41]

1. You need to multiply the denominator by something that will make the content of the radical be a square—so that when you take the square root, you get something rational. Easiest and best is to multiply by √6. Of course, you must multiply the numerator by the same thing. Then simplify.

\displaystyle\frac{2}{\sqrt{6}}=\frac{2}{\sqrt{6}}\cdot\frac{\sqrt{6}}{\sqrt{6}}\\\\=\frac{2\sqrt{6}}{\sqrt{6}\cdot\sqrt{6}}=\frac{2\sqrt{6}}{6}\\\\=\bf{\frac{\sqrt{6}}{3}}

2. Identify the squares under the radical and remove them.

5\sqrt{12xm^3}=5\sqrt{(4m^2)(3xm)}=5\sqrt{(2m)^2}\sqrt{3xm}\\\\=5\cdot 2m\sqrt{3xm}=\bf{10m\sqrt{3xm}}

7 0
3 years ago
Read 2 more answers
Help WILL GIVE BRAINLIEST!!!
aleksandrvk [35]

Answer:

The correct choice is the third answer.

Step-by-step explanation:

The arrow on top of the letters means that they would be parallel.  If you look closely at the diagram, you can see that both QR and TU go in the same direction and will never intersect.

5 0
3 years ago
Pls solve this problem!!
castortr0y [4]
264.8 is your answer
6 0
3 years ago
Read 2 more answers
HELP PLEASE!!!
VMariaS [17]

Answer:

Neither

Step-by-step explanation:

First, you need to put your equations in y=mx+b form

Your first equation...

5x + 4y = 3

4y = 3-5x

y = -5/4x + 3/4

Your second equation...

5x-4y = -3

-4y = -5x -3

y = 5/4x + 3/4

The slopes aren't the same and are not reciprocals, so the answer would be neither.  

7 0
3 years ago
Two trains, Train A and Train B, weigh a total of 150 tons. Train A is heavier than train B. The difference of their weights is
Cloud [144]

Answer:

train b.

Step-by-step explanation:

becus of the 150 tons and 100 tons

6 0
3 years ago
Read 2 more answers
Other questions:
  • There are 12 grams of sugar in 1⁄3 of a piece of candy. How much sugar is in 3⁄4 of a piece of candy?
    14·1 answer
  • <img src="https://tex.z-dn.net/?f=%20%5Cfrac%7Bx%7D%7B%20-%204%7D%20%20%2B%2011%20%3D%205" id="TexFormula1" title=" \frac{x}{ -
    6·1 answer
  • Select the problem that would help you use the distributive property to simplify the expression. Which shows the distributive me
    13·2 answers
  • Plz solve this question. you don't have to solve step by step but just give me some hints​
    5·1 answer
  • Can you please answer this?
    13·1 answer
  • Is this wrong?
    5·1 answer
  • Put the following equation of a line into slope-intercept form, simplifying all fractions.
    8·1 answer
  • If the quadratic function y=8x−4x2+5y=8x−4x2+5 is to be transformed in its vertex form, what number should be placed in the box?
    5·1 answer
  • Classify the quadrilateral. A. square B. rhombus C. trapezoid D. rectangle also how do you add a picture​
    9·1 answer
  • Pls help !!! I've already failed it twice this is my last try please help there's other questions on my account.​
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!