Ask question

Ask question

All categories

3 years ago

7

PLS HELP! Tell whether each of the following is a function or not. How do you know?

2 answers:

PtichkaEL [24]3 years ago

8 0

Answer:

Top two are functions bottom two are not, functions can only have one outpur for each input, or one y value for each x value.

Step-by-step explanation:

functions can only have one one output for every input. this means on a graph if you draw a vertical line if the graph touches that line in two places it is not a function, so the lower left graph is not a function.

if you only hae points or ordered pairs like the lower right part of the picture you have to make sure that each x value is only matched up with 1 y value. so there is (3, 3) and (3,9) both have the input (x value) of 3 but one has an output (y value) of 3 ad the other has 9, so one input has multiple outputs, or if you prefer one x value coresponds to multiple y values. Either way is correct.

Important to say multiple inputs can have the same output. For instance x^2 has both -2 and 2 as inputs have 4 as outputs, but it is still a function. if it had 2 correspond to BOTH 4 and -4 or something else then it would not be a function.

Nataly [62]3 years ago

7 0

Answer: It is

Step-by-step explanation:

None of the lines will ever touch each other resulting in a function.

You might be interested in

Select the correct answer.<br> Simplify the expression.

gregori [183]

Answer:

Option D :- $\sf \: 18 {x}^{2} {y}^{2} \sqrt[3]{3 {xy}^{2} }$

Step-by-step explanation:

$\sf \: 3x\sqrt[3]{648 {x}^{4} {y}^{8} }$

transform the equation

$\rightarrow \sf \: 3x\sqrt[3]{ {6}^{3} \times {3x}^{2} \times {xy}^{6} \times {y}^{2} }$

rewrite the expression

$\rightarrow \sf \: 3x \times \sqrt[3]{ {6}^{3}} \times\sqrt[3]{ {3x}^{2}} \times \sqrt[3]{ {xy}^{6} } \times \sqrt[3]{{y}^{2} }$

Simplify the radical expression

$\rightarrow \sf \: 3x \times {6xy}^{2} \sqrt[3]{3xy {}^{2} }$

Multiply

$\sf \: 18 {x}^{2} {y}^{2} \sqrt[3]{3 {xy}^{2} }$

8 0

2 years ago

Express f in standard form: f(x) = x^2 − 2x + 3

serious [3.7K]

Answer:

Step-by-step explanation:

If f(x)=2x^2-x-6 and g(x)=x^2-4, find f(x)/g(x)

2x+3/x-2

2x-3/x+2

2x+3/x+2

8 0

3 years ago

Solve thye inequality 2/3x - 1/6 > 1/2

weeeeeb [17]

Answer:

x > 1

Explanation:

$\frac{2}{3} x-\frac{1}{6} >\frac{1}{2}$ =<u> x > 1</u>

7 0

3 years ago

The round wading pool at the Greenville Community Center has a diameter of 8 feet. What is the pool's circumference? use 3.14 fo

HACTEHA [7]

The circumference of pool is 25.12 feet

<em><u>Solution:</u></em>

Given that round wading pool at the Greenville Community Center has a diameter of 8 feet

Therefore,

Diameter = 8 feet

We know that,

$Radius = \frac{diameter}{2}\\\\Radius = \frac{8}{2}\\\\Radius = 4$

Thus radius is 4 feet

<em><u>The circumference of circle is given by formula:</u></em>

$C = 2 \pi r$

Where, "r" is the radius of circle

Substitute r = 4

$C = 2 \times 3.14 \times 4\\\\C = 25.12$

Thus circumference of pool is 25.12 feet

7 0

3 years ago

The denominator of a fraction in the simplest form is greater than the numerator by 1. If 4 is added to the numerator, and 3 is

Fantom [35]

Answer:

Step-by-step explanation:

Let the original fraction is: x/ x-1

And we have that:

4 is added to the numerator => new numerator is: x+4
3 is subtracted from the denominator => new denominator is: x -1-3 = x -4

the fraction itself is increased by 2 $\frac{1}{6}$

<=> $\frac{x}{x-1} *2\frac{1}{6}$ = $\frac{x+4}{x-4}$

<=> $7x^{2} -70x +24 = 0$

Solve for X then we substitue into the original fraction

4 0

3 years ago