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Angelina_Jolie [31]
4 years ago
14

Edith budgets a maximum of $50 per month for her cell phone bill. her cell phone provider charges $30 a month as a base fee $0.1

0 per minute for usage of the cell phone. Which number line shows how many minutes Edith can use each month and stay within her budget
Mathematics
1 answer:
ddd [48]4 years ago
7 0
I can’t really create a number line so I’m SUPER DUPER Sorry but she will be able to be on her phone for 200 minutes and stay within her budget.Heres why because you take $30 dollars from the $50 because the monthly fee.Then she has $20 to use on actually using her phone for 200 minutes.


Answer:200 minutes
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Answer:

If k = −1 then the system has no solutions.

If k = 2 then the system has infinitely many solutions.

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Step-by-step explanation:

We have the following system of equations

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The reduction of this matrix to row-echelon form is outlined below.

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R_3\rightarrow R_3-2R_1

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The last row determines, if there are solutions or not. To be consistent, we must have k such that

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Case k = −1:

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If k = −1 then the last equation becomes 0 = −2 which is impossible.Therefore, the system has no solutions.

Case k = 2:

\left[\begin{array}{ccc|c}1&-2&3&2\\0&3&-2&2-2\\0&0&0&(2)^2-(2)-2\end{array}\right] \rightarrow \left[\begin{array}{ccc|c}1&-2&3&2\\0&3&-2&0\\0&0&0&0\end{array}\right]

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