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
Lubov Fominskaja [6]
3 years ago
15

Which of the following expressions represents a function?

Mathematics
1 answer:
makkiz [27]3 years ago
8 0
Selection A is appropriate.

_____
The rest of the choices have one value of x corresponding to multiple values of y. Thus, they don't meet the requirement of a function.
You might be interested in
What is the proportion for x
Artist 52 [7]
12x15=18(3x+4)
180=54x+72
-72 -72
108=54x
/54 /54
2=x

X=2 the other person is a d0uche for answering like that so I answered instead of them
8 0
3 years ago
Graph the circle (x+6)^2 + (y+5)^2 =9
Andrei [34K]

Answer:

This a circle centered at the point (-6,-5), and of radius "3" as it is shown in the attached image.

Step-by-step explanation:

Recall that the standard formula for a circle of radius "R", and centered at the point (x_0,y_0) is given by:

(x-x_0)^2+(y-y_0)^2=R^2

Therefore, in our case, by looking at the standard equation they give us, we extract the following info:

1)  R^2 = 9\,\,\,then\,\,\,R=3  since the radius must be a positive number and (R=-3) is not a viable answer.

2) x_0=-6    for ( x-x_0) to equal   (x+6)

3) y_0=-5    for ( y-y_0) to equal   (y+5)

Therefore, we are in the presence of a circle centered at the point (-6,-5), and of radius "3". That is what we draw as seen in the attached image.

5 0
3 years ago
Tim took a random survey of 20 sixth graders and 20 eighth graders. He asked how many hours a week each played sports. His data
34kurt

Answer: 4 hours

Step-by-step explanation:

The median number is always in the middle the other numbers have to be equal on both sides 5 is the middle number on the plot 6th graders have 4 dots and 8th graders have 0 dots which means the hourly difference is 4

4 0
3 years ago
Miguel is a golfer, and he plays on the same course each week. The following table shows the probability distribution for his sc
aivan3 [116]

1) 4.55

2) Short hit

Step-by-step explanation:

1)

The table containing the score and the relative probability of each score is:

Score 3 4 5 6 7

Probability 0.15 0.40 0.25 0.15 0.05

Here we call

X = Miguel's score on the Water Hole

The expected value of a certain variable X is given by:

E(X)=\sum x_i p_i

where

x_i are all the possible values that the variable X can take

p_i is the probability that X=x_i

Therefore in this problem, the expected value of MIguel's score is given by:

E(X)=3\cdot 0.15 + 4\cdot 0.40 + 5\cdot 0.25 + 6\cdot 0.15 + 7\cdot 0.05=4.55

2)

In this problem, we call:

X = Miguel's score on the Water Hole

Here we have that:

- If the long hit is successfull, the expected value of X is

E(X)=4.2

- Instead, if the long hit fails, the expected value of X is

E(X)=5.4

Here we also know that the probability of a successfull long hit is

p(L)=0.4

Which means that the probabilty of an unsuccessfull long hit is

p(L^c)=1-p(L)=1-0.4=0.6

Therefore, the expected value of X if Miguel chooses the long hit approach is:

E(X)=p(L)\cdot 4.2 + p(L^C)\cdot 5.4 = 0.4\cdot 4.2 + 0.6\cdot 5.4 =4.92

In part 1) of the problem, we saw that the expected value for the short hit was instead

E(X)=4.55

Since the expected value for X is lower (=better) for the short hit approach, we can say that the short hit approach is better.

8 0
2 years ago
Can someone help me solve this? What goes in the blank?<br><br> 38 47 56 65 __ 83 92
lesya692 [45]
74 because each number is increased by 9
7 0
3 years ago
Read 2 more answers
Other questions:
  • A car travels 160km in 2 hours.<br> What is the average speed of the car?
    8·2 answers
  • Help me please because I don’t get it
    14·1 answer
  • How do i convert 37/4 into mixed numbers
    5·1 answer
  • How to draw a model of<br> 7/6 <br><br> Give u 12 points
    12·1 answer
  • If x^2y^3=10 and x^3y^2=8, what is the value of x^5y^5
    14·1 answer
  • What are the slope, m, and y-intercept, (0,b), of the line described by the equation 3x+6=12
    14·1 answer
  • The function h (x) = StartFraction 1 Over x squared + 1 EndFraction is the result of the composition f(g(x)). If g(x) = x2 + 1,
    5·2 answers
  • 6(y + 8) = I need help please :)
    5·2 answers
  • Help pls Which expression is equivalent to -9+5−9+5?
    13·2 answers
  • The points shown on the graph represent the numbers in
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!