1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Evgesh-ka [11]
2 years ago
12

Hello! Please help me with this question. I’ll mark brainly! Thank you :)

Mathematics
1 answer:
Anettt [7]2 years ago
3 0

Answer:

\Huge\boxed{\$ 12.12}

Step-by-step explanation:

In order to find how much credit is left after 92 minutes, we need to

1.  Figure out the equation that describes this graph (since we don't know the y-intercept)

2. Find the credit remaining after 92 minutes using the equation formed.

<h2>Figuring out the equation of this graph:</h2>

First things first is to figure out the slope of this graph. Since this is a linear function, the slope will remain constant, and we can note something about slope here.

The slope of a line will be it's change in x divided by its change in y, often referred to with a formula.

\frac{\Delta y}{\Delta x}

Since we know two points on this graph, we can find the changes in the x and y then divide for the slope.

Since minutes used is the x, and credit left is the y, we have two points.

(41, 19.26) and (68, 15.48).

  • The change in y is -3.78, as 19.26-15.48=3.87, and we decreased, so -3.78.
  • The change in x is 27 as 68-41=27, and we increased.

The slope will then be \frac{-3.78}{27} which comes out to be -0.14.

Now that we know the slope, that means our equation will look something like y = -0.14x+b - however, we still have b to solve for!

To solve for it, we can substitute one of our points in - let's do (41, 19.26) - to the equation and solve for b.

  • 19.26 =-0.14 \cdot 41 +b
  • 19.26 = -5.74+ b
  • b = 19.26+5.74
  • b = 25

Now that we know that b = 25, we can plug it into our equation, <u><em>making the final equation that represents this scenario</em></u>

y = -0.14x+25

<h2>Solving for 92 minutes</h2>

Now that we know the equation to our graph, we can substitute in 92 minutes as the x value to find our y value (credit left).

  • y = -0.14 \cdot 92 + 25
  • y = -12.88+25
  • y =12.12

Therefore, after 92 minutes, the amount of credit left is $12.12

Hope this helped!

You might be interested in
Which system of equations can you use to find the roots of the equation? x3 – 10x = x2 – 6 y = x3 – x2 + 10x + 6 y = 0 y = x3 –
Maslowich

Answer:

answer is:

y=x^{3}-10 x,y=x^{2}-6

Step-by-step explanation:

we are asked to find which system of equations can we use to find the roots of the equation:

x^{3}-10x=x^{2}-6

since the system of equation in last part is given as:

y=x^{3}-10 x,y=x^{2}-6

so, on equating both the equations i.e. on equating both the values of 'y' we get the desired equation as:

x^{3}-10x=x^{2}-6.


3 0
3 years ago
Read 2 more answers
The length of a rectangle is 71/2 inches and the width is 23/4 inches. What is the ratio, using whole numbers, of the length to
Over [174]

Answer:

142:23

Step-by-step explanation:

The length of the rectangle is given as 71/2 while its width is 23/4

We are required to determine the ratio of the length to the width;

length:width

(71/2):(23/4)

(71/2)/(23/4)

71/2 * 4/23 = 142/23

The ratio of the length to the width is thus;

142:23

6 0
2 years ago
What is the perimeter of the rectangle in the coordinate plane?
snow_lady [41]
26 units is the answers for this questions. To find the perimeter, put a slash in each square. The only squares that will get 2 slashes is the corners
3 0
2 years ago
Read 2 more answers
Does the equation 14 - 3x = -4x have one, many or no solution?​
BabaBlast [244]

Answer:

one solution,x=- 14

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Suppose you can factor x^2 + bx + c as (x + p)(x + q). If c &gt; 0, what could be possible values of p and q?
ad-work [718]

p could be 5 and q could be 8 this is just my guess but i think its right

3 0
2 years ago
Other questions:
  • Equation for the points (3,8) (2,6) on slope
    15·2 answers
  • Solid: A square pyramid. The square base has side lengths of 5. The 4 triangular sides have a base of 5 and height of 7. What is
    5·2 answers
  • 43% of 300 is what number
    8·1 answer
  • Worth 10 points, please help.:):):)
    10·2 answers
  • I need the answers to this. I have no clue at all how to do this!
    13·1 answer
  • (4x10^2) - (2x10^-1)
    15·1 answer
  • What is the estimated sum of 3 16/17 plus 6 1/5?<br> The estimated sum is
    7·2 answers
  • **10 POINTS PLEASE HELP**
    8·1 answer
  • Hello how is ur days going
    9·2 answers
  • What is the slope of the line passing through the points
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!