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gladu [14]
3 years ago
10

20 BIG POINTS! Help me with two questions please! The first two files are actually ONE question. Explain why your answers seem t

o be correct?

Mathematics
2 answers:
Helen [10]3 years ago
5 0
A function is where you input something and get out another thing
generally you are talking about one-to-one functions where for every input you get exactly one output
x is input and y is input
basicaly, x never repeats

2 ways to find a function
1. if on a graph, then it must pass the vertical line test whre if you draw a vertical line ANYWHERE on the graph, then it must pass through the graph of the equation no more than one times
2. if on a set then make sure that x doesn't repeat with a different y so if you had (2,3) and (2,4) then that is not a function


A is a function since passes vertical line test
B is a function since x doesn't repeat
C is NOT a function since x=3 has a y value of 5 and -2
D is NOT a function since you have the points (2,2) and (2,6)

so select A and B






basically just lok at the first number of each ordered pair (x,y) and make sure the first number never repeats with a different second number (x,y) and (x,z) is not function if z is not equal to y


so
1 is a function since the numbers never repat
2 is NOT a function since we have the points (2,3) and (2,5)
3 is NOT a function since we have th points (4,2) nd (4,8) and the points (6,3) and (6,6)
4 is NOT a function since we have the points (6,8) and (6,4)
so only first is function



ANSWERS
so the functions are
A and B for first quetsion
#1 fors econd
garik1379 [7]3 years ago
4 0
The first one is A,B,and D because for A a function on a graph rises from left to right.B because the input or x is not repeating so just remember that too many x's ain't right but more than one y or output is okay.D because each x is not repeating which is a no no in functions.The second question is the first one is a function and the rest no because the first one none of the x or repeating the other ones their x in their data set is repeating.
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The mathematics department of a college has 6 male professors, 9 female professors, 5 male teaching assistants, and 6 female tea
Hitman42 [59]

Given:

6 male professores

9 female professores

5 male teaching assistants

6 female teaching assistants

Sol:.

N(A\text{ or B)=N(A)+N(B)-N(A and B)}

N (professors)

\begin{gathered} =6+9 \\ =15 \end{gathered}

N(Male)

\begin{gathered} =6+5 \\ =11 \end{gathered}

N(professors and male)

=6

N(professors OR male) = N(professors) + N(males) -N(professor OR male)

\begin{gathered} N(\text{ Professors OR male)=15+11-6} \\ =20 \end{gathered}

N(People to choose from)

\begin{gathered} =6+9+5+6 \\ =26 \end{gathered}

Then probablitiy is:

\begin{gathered} =\frac{20}{26} \\ =\frac{10}{13} \end{gathered}

Then the probability is 10/13

6 0
1 year ago
14x + 6 = 5x - 3 with solution
Schach [20]

hey there

the answer is

14x + 6 = 5x + -3


6 + 14x = 5x + -5

6 + 14x = -3 + 5x


6 + 14x + -5x = -3 + 5x + -5x


Combine like terms: 14x + -5x = 9x

6 + 9x = -3 + 5x + -5x


Combine like terms: 5x + -5x = 0

6 + 9x = -3 + 0

6 + 9x = -3

6 + -6 + 9x = -3 + -6


Combine like terms: 6 + -6 = 0

0 + 9x = -3 + -6

9x = -3 + -6


Combine like terms: -3 + -6 = -9

9x = -9


Divide each side by '9'.

x = -1


Simplifying

x = -1

thank you

OFFICIALLYSAVAGE2003

5 0
4 years ago
What set of ordered pairs represents y as a function of x?
rusak2 [61]
The set {(1, 2), (2, -3), (3, 4), (4, -5)} represents y as a function of x
Question 2:
The best statement describes the relation is "The relation represents y as a function of x, because each value of x is associated with a single value of y" ⇒ 3rd answer
Question 4:
There are missing options so we can not find the correct answer
Question 5:
The sets {(1 , 1), (2 , 2), (2 , 3)} and {(1, 2), (1, 3), (1, 1)} do not represent y as a function of x ⇒ 1st and 4th answers
Step-by-step explanation:
The relation is a function if each value of x has ONLY one value of y
Ex: The set {(3 , 5) , (-2 , 1) , (4 , 3)} represents y as a function of x because x = 3 has only y = 5, x = -2 has only y = 1, x = 4 has only y = 3
The set {(4 , 5) , (-2 , 1) , (4 , 3)} does not represent y as a function of x because x = 4 has two values of y 5 and 3
3 0
3 years ago
Which word sentence represents the equation?
PolarNik [594]
I believe its the second one because it say four times the number wich the number is the y and it is = too the number wich is y and increased going up are adding by 9. hope that helped.
8 0
3 years ago
Read 2 more answers
Given AB is tangent to circle C at point B, what is the circumference of circle C?
faltersainse [42]

<u>Given</u>:

Given that AB is a tangent to circle C.

The length of AB is (2r -1)

The length of AC is (r + 1) + r

The length of BC is r.

We need to determine the circumference of the circle C.

<u>Value of r:</u>

The value of r can be determined using the Pythagorean theorem.

Thus, we have;

AC^2=AB^2+BC^2

Substituting the values, we have;

[(r+1)+r]^2=(2r-1)^2+r^2

Simplifying, we have;

(2r+1)^2=(2r-1)^2+r^2

Expanding the terms, we get;

4r^2+4r+1=4r^2-4r+1+r^2

4r^2+4r+1=5r^2-4r+1

Simplifying the values, we have;

4r=-4r+r^2

Adding both sides of the equation by 4r, we get;

8r=r^2

 0=r^2-8r

 0=r(r-8)

Thus, r=0 \ or \ r=8

Since, the radius of the circle cannot be 0.

Hence, the radius of the circle is 8.

<u>Circumference of the circle:</u>

The circumference of the circle can be determined using the formula,

C=2 \pi r

Substituting r = 8, we get;

C=2 \pi (8)

C=16 \pi

Thus, the circumference of the circle is 16π

Hence, Option A is the correct answer.

5 0
3 years ago
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