jasonsnyder176
contestada

The only coins that Alexis has are dimes and quarters. Her coins have a total value of $5.80. She
has a total of 40 coins. How many does she have of each coin?

Respuesta :

calculista

Answer:

Alexis has 28 dimes and 12 quarters

Step-by-step explanation:

Remember that

[tex]1\ dime=\$0.10[/tex]

[tex]1\ quarter=\$0.25[/tex]

Let

x ---->the number of dimes Alexis has

y ---> the number of quarters Alexis has

we know that

[tex]x+y=40[/tex] -----> equation A

[tex]0.10x+0.25y=5.80[/tex] ----> equation B

Solve the system by graphing

Remember that the solution is the intersection point both graphs

using  graphing tool

The solution is the point (28,12)

see the attached figure

therefore

Alexis has 28 dimes and 12 quarters

Ver imagen calculista

Otras preguntas