Jane has 15 phone cards worth either $20 or $15. How many of each does she have if the phone cards total $245?

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Аноним Аноним · Answer 1 · 2020-02-05T05:55:26+01:00

The correct answer is 12

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swapnalimalwadeVT swapnalimalwadeVT · Answer 2 · 2022-03-19T14:05:48+01:00

Jane has 4 number of 20 phones and 11 number of 15 phone cards.

It is given that 15 phone cards worth either $20 or $15

lets Jane has x number of 20 phones and y number of 15 phone cards

Then by the problem we have

x+y=15....(1)

20x+15y=245....(2)

Solve one of the equations either for the variable x or y. Now, substitute the solution from step 1 to the other equation.

So by using substitution method we have,

from equation 1 we get

y=15-x

use this value in equation 2

[tex]20x+15(15-x)=245\\\\20x+225-15x=245\\\\5x+225=245[/tex]

[tex]5x=20\\x=4\\y=15-4\\y=11[/tex]

Therefore we get x=4 and y=11

Therefore,Jane has 4 number of 20 phones and 11 number of 15 phone cards.

To learn more about the linear equation visit

https://brainly.com/question/14323743