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BaLLatris [955]
3 years ago
11

Customers of a phone company can choose between two service plans for long distance calls. The first plan has a $25 monthly fee

and charges an additional $0.14 for each minute of calls. The second plan has no monthly fee but charges $0.18 for each minute of calls. For how many minutes of calls will the costs of the two plans be equal?
Mathematics
1 answer:
yKpoI14uk [10]3 years ago
6 0
1st plan: $25 + $0.14 = $25.14
2nd plan: $0.18

25.14 x 3 minutes of calls = 75.42
75.42 / 0.18 = 419
or 0.18 x 419 minutes of calls = 75.42

So, for the 1st plan there is 3 minutes of calls
and the 2nd plan there is 419 minutes of calls.
The costs of the two plans will be equal which is $75.42 each.
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kobusy [5.1K]
Solutions  

In Matrix we use initially based on systems of linear equations.The matrix method is similar to the method of Elimination as but is a lot cleaner than the elimination method.Solving systems of equations by Matrix Method involves expressing the system of equations in form of a matrix and then reducing that matrix into what is known as Row Echelon Form.<span> 

Calculations 

</span>⇒ <span>Rewrite the linear equations above as a matrix 
</span>
\left[\begin{array}{ccc}3&5&42\\6&5&54\\\end{array}\right] 

⇒  Apply to Row₂ : Row₂ - 2 <span>Row₁ 
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\left[\begin{array}{ccc}3&5&42\\0&-5&-30\\\end{array}\right] 

⇒ <span>Simplify rows
</span>
\left[\begin{array}{ccc}3&5&42\\0&1&6\\\end{array}\right] 

Note: The matrix is now in echelon form.
<span>The steps below are for back substitution. 
</span>
⇒ Apply to Row₁<span> : Row</span>₁<span> - </span>5 Row₂ 

\left[\begin{array}{ccc}3&0&12\\0&1&6\\\end{array}\right] 

⇒ <span>Simplify rows 
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\left[\begin{array}{ccc}1&0&4\\0&1&6\\\end{array}\right] 

⇒ <span>Therefore, 
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x=4&#10;&#10;y = 6
<span> 

 
</span>

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What's the equation of these points in slope.
Rashid [163]
Google “slope calculator” on google
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3 years ago
Lily earned 317 pokemon go points. Sophia earned 25 times the amount of points lily earned. How many points did sophia earn?
pickupchik [31]
First of all this question is awesome.

second 317 x 25 = 7925

Be sure to give me a thanks and rate me 5 stars :D
5 0
3 years ago
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Mrs. Dider had $75 to purchase supplies for a party. She bought 46 party favors and 63 cupcakes. Each party favor cost $0.75 and
MatroZZZ [7]

Answer:

$7.74

Step-by-step explanation:

0.75x46=34.5

0.52x63=32.76

34.5+32.76=67.26

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6 0
3 years ago
2(3-8y)= Apply the distributive property to create an equivalent expression.
umka2103 [35]

Answer:

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Hope this helps.

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