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3 years ago

Plz help!!!!!!!!!!!!!!

Mathematics

1 answer:

s2008m [1.1K]3 years ago

8 0

Answer: d) 4

Step-by-step explanation:

The x-intercept is when y = 0

$y=\dfrac{x-4}{x^2-4}\\\\\\\text{Set y equal to zero:}\\0=\dfrac{x-4}{x^2-4}\\\\\\\text{Cross multiply:}\\0=x-4\\\\\\\text{Solve for x:}\\4=x$

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Drag the correct description to tell whether the graph represents a function.

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Using the function concept, it is found that:

The 1st graph is not a function.

The 2nd and the 3rd graph are functions.

<h3>What is a function?</h3>

In a function, one value of the input can be related to only one value of the output.

In a graph, it means that for each value of x(horizontal axis), there can only be one respective value of y(vertical axis), that is, there cannot be point that are aligned vertically.

In this problem:

On the first graph, there are points that are aligned vertically, for example, when x = -2, y = -2 and y = 2, hence, it is not a function.

On the 2nd and on the 3rd graph, there are no points aligned vertically, hence, they are functions.

To learn more about the function concept, you can take a look at brainly.com/question/12463448

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2 years ago

What’s the relationship between the number $4 lunches you buy with $100 school lunch card and the money remaining on the card

kykrilka [37]

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3 years ago

You have a wire that is 38 cm long. You wish to cut it into two pieces. One piece will be bent into the shape of a square. The o

Drupady [299]

Answer:16.71 cm

Step-by-step explanation:

Given

Length of wire L=38 cm

One piece is bent in the form of square and another in the form of circle

let x be the length of circle

therefore length of square side $\frac{38-x}{4}$

A=total area of square and circle

radius of circle $r=\frac{x}{2\pi }$

area of circle $A_c=\pi r^2=\pi \times (\frac{x}{2\pi })^2$

Area of square $A_s=(\frac{38-x}{4})^2$

$A=\pi \times (\frac{x}{2\pi })^2+(\frac{38-x}{4})^2$

To get the minimum value of A we get

$\frac{\mathrm{d} A}{\mathrm{d} x}=\frac{2x}{4\pi }-\frac{2(38-x)}{16}$

$\frac{\mathrm{d} A}{\mathrm{d} x}=0$

$\frac{x}{4\pi }=\frac{38-x}{16}$

$x=\frac{38\pi }{4+\pi }$

Therefore circumference of circle

$x=\frac{38\pi }{4+\pi }=\frac{119.396}{7.142}=16.717 cm$

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3 years ago

Factor the expression y2+6y-16

ozzi

$y^2+6y-16=y^2+8y-2y-16=y(y+8)-2(y+8)=(y+8)(y-2)$

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3 years ago

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alexgriva [62]

Answer:

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Explanations:

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2 years ago

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