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3 years ago

The graph of a rational function, f, is shown in the figure. Use the graph to find f(-2)

Mathematics

1 answer:

lana66690 [7]3 years ago

7 0

When we plug a value into a function, we are looking for the y-value. To find f(-2), we are looking for the point (-2, y). So, we need to find the y-value for this function where the x-value is -2.

f(-2) = -4

Hope this helps! :)

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PLEASE HELP ASAP!!! CORRECT ANSWERS ONLY PLEASE!! Subract and simplify.

pantera1 [17]

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Step-by-step explanation:

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Answer

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3 years ago

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Ilya [14]

Answer:

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69.93 - 4 = 65.93

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2 years ago

Select all the correct answers.

sukhopar [10]

Answer:

Second point (-5/2, -7/2)

First point (3/2, 17/2)

Step-by-step explanation:

We have two equations, and we want to know at wich poin are equal. Hence, we have a system of equations and the solution is nothing more that the point (x,y) where those functions intercepts.

4x2+ 7x -11=y

3x+4=y

Lets use substitute method

4x2+7x-11=3x+4

This can be re arrange as the following eq:

4x2+4x-15=0

A quadratic equation, its solution can be obtained using the below eq.

$x=\frac{-b+/- \sqrt{x^{2}-4ac } }{2a}$

where a=4, b=4, c=-15.

Remember, the quadratic equation as a +/- sign, meaning that you will obtain one answer using the + operator and other using the - operator.

By doing the above, we have x=-5/2 and x=3/2

By using x=3/2 in equation of line (3x+4=y) we have y=17/2

First point (3/2, 17/2)

By using x=-5/2 in equation of line (3x+4=y) we have y= -7/2

Second point (-5/2, -7/2)

Those points are the ones where the line and the parabola intercept.

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3 years ago