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kaheart [24]
3 years ago
12

The linear function graphed below represents Brenda’s monthly cell phone bill based on the number of hours she uses. What is her

hourly rate? A graph titled Brenda's Monthly Cell Phone Bill has hours used on the x-axis and cell phone bill (dollars) on the y-axis. Points plotted are (1, 27), (2, 39), and (3, 51). $12 per hour $15 per hour $27 per hour $39 per hour
Mathematics
2 answers:
grigory [225]3 years ago
6 0

Answer:

$12 per hour

Step-by-step explanation:

In order to find her hourly rate we have to find the amount of dollars billed per hour. To do this we can use this expression: \frac{y2 - y1}{x2 - x1}

Let's use the points (1, 27) and (2, 39) in the expression:

\frac{39 - 27}{2 -1}

Now let's simplify the expression:

39 - 27 = 12

2 - 1 = 1

The expression simplifies to 12/1, or 12. This means that Brenda is billed $12 every hour she uses her phone.

I hope this helps :)

Butoxors [25]3 years ago
5 0

Answer:

12$ per hour!

Step-by-step explanation:

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28 mins = 2 miles

1 min = 2 ÷ 28 = 1/14 miles

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Answer: 5 miles
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3 years ago
A boat traveled 54 km with the stream and 42 km against the stream spending a total of as much time as it would spend while trav
Genrish500 [490]

Answer:

  • 24 km/h

Step-by-step explanation:

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  • The speed of the current = 3 km/h

<u>Required equation:</u>

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7 0
3 years ago
The augmented matrix of a system of equations has been transformed to an equivalent matrix in​ row-echelon form. Using​ x, y
jenyasd209 [6]

Answer: The system of equations is:

x + 2y + 2 = 4

y - 3z = 9

z = - 2

The solution is: x = -22; y = 15; z = -2;

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The method consists in transforming the system into an augmented matrix, which is writing the system in form of a matrix and then into a <u>Row</u> <u>Echelon</u> <u>Form,</u> which satisfies the following conditions:

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For this question, the matrix is a Row Echelon Form and is written as:

\left[\begin{array}{ccc}1&2&2\\0&1&3\\0&0&1\end{array}\right]\left[\begin{array}{ccc}4\\9\\-2\end{array}\right]

or in system form:

x + 2y + 2z = 4

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z = -2

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The solution is (-22,15,-2).

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Answer:

64 teachers

Step-by-step explanation:

We can use ratios to solve

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Using cross products

14 * x = 896*1

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4 0
3 years ago
What is the value of x?<br><br><br><br> Enter your answer in the box.
charle [14.2K]

Hi there!

We know that RST is an equilateral(all 3 sides the same length) triangle, and is therefore equiangular(all 3 angles the same value).  Therefore, angle S and is equal to one-third of the triangle's angle measure.  

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-AwesomeRepublic  :)

4 0
3 years ago
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