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
finlep [7]
3 years ago
8

I don't understand how to solve this, please help!

Mathematics
1 answer:
murzikaleks [220]3 years ago
7 0

Answer:

x+1 , x<-1

x²-bx-4  , -1≤x≤4

1/2 x +a

substitute x=-1 , continuous everywhere

x+1=x²-bx-4 when x=-1

-1+1=-1²-b-4

<h2>1+b-4=0 ⇒ +b-3 ⇒ b=3</h2>

then for :

x²-bx-4=1/2 x +a for x=4

4²-4b-4=1/2x+a

16-4(3)-4=4/2+a

16-12-4-2=a

<h2>a=-2</h2>

the equations will be :

x+1

x²-3x-4

1/2x-2

I hope this help

You might be interested in
How many times does the line y=-1 touch the graph? (Ensure to draw your line on the graph)​
wlad13 [49]

Answer:

twice

Step-by-step explanation:

y = - 1 is a horizontal line parallel to the x- axis and passing through all points with a y- coordinate of - 1

Drawing this line on the graph, from (0, - 1 ) we can see that it will intersect the graph at 2 places between (0, 0 ) and (2, - 2 ) and between (2, - 2 ) and (4, 0 )

8 0
3 years ago
A basketball coach keeps track of the points scored per game for all of the players . She gives a trophy to the player with the
Verdich [7]

Your Question was incomplete so I will solve a similar question that will help you to tackle this kind of questions.

Q)Two university female basketball players are being considered for an award to be given to the most consistent player with the highest scoring average for the season. The number of points scored per game for all games played during the season is given by the following table. ( Table Attached)

a) Calculate the population mean and population standard deviation of the number of points scored per game for each player.

(b) Using the results of part (a) which player should receive the award.

Answer:

<h3><u>Player B should receive the award.</u></h3><h3>Step-by-step explanation:</h3>

Points of player A:- 5,32,45,25,8,10,35,12,37,21

<u>First we will calculate the mean for player A</u>

∑x =  5 + 32 + 45 + 25 + 8 + 10 + 35 + 12 + 37 + 21

∑x = 230

N = 10

<u>Mean = µ= ∑x/N = 230/10 = 23</u>

<u>Now we will calculate the standard deviation for Player A</u>

x - µ = -18 , 9, 22, 2, -15, -13, 12, 11, 14, -2

(x - µ)^2 = 324, 81, 484, 4, 225, 169, 144, 121, 196, 4

∑(x - µ)^2 = 1752

σ = sqrt( ∑((x - µ)^2/N) )

σ = sqrt(1752/10)

<u>σ = 13.236</u>

<u>Calculating mean for player B:</u>

Points of player B = 18, 20, 22, 15, 35, 24, 29, 19, 25, 23

∑x =  18 + 20 + 22 + 15 + 35 + 24 + 29 + 19 + 25 + 23

N =10

µ = 230/10

<u>µ  = 23</u>

<u>Calculating standard deviation for player B:</u>

(x - µ ) = -5, -3, -1, -8, 12, 1, 6, -4, 2, 0

(x -µ )^2 = 25, 9, 1, 64, 144, 1, 36, 16, 4, 0

∑(x - µ)^2 = 300

σ = sqrt(300/10)

<u>σ = 5.48</u>

Since both Player A and Player B have same mean we will calculated the coefficient of variation for both the players.

<u>For player A:</u>

σa/µa *100 = 13.24/23 *100 = 57.56

<u>For Player B:</u>

σb/µb *100 = 5.48/23 * 100 = 23.82

<u>Since the coefficient of variation of Player B is less than Player A hence Player B should receive the award.</u>

3 0
3 years ago
Read 2 more answers
Addition and Subtraction Property <br> what is x + 5 + 7
MakcuM [25]

Answer:

the answer to the equation is x + 12

Step-by-step explanation:

x + 5 + 7 = x + 12

x + 12

6 0
3 years ago
Read 2 more answers
A square with sides of 7.6 m has an area of<br> meters squared.
Lilit [14]

Answer:

i  am pretty sure yes

Step-by-step explanation:

6 0
4 years ago
Read 2 more answers
Elizabeth states, "if the diagonals of a parallelogram are congruent, then the parallelogram is a rhombus." decide if her statem
Igoryamba
Hello,
Answer B: false

the parallelogram is a rectangle
8 0
4 years ago
Read 2 more answers
Other questions:
  • a skateboard ramp makes a 22 degree angle with the ground.to the nearest foot how high is the ramp if it is 32 ft. on the ground
    14·1 answer
  • What is the exact volume of the cylinder,
    7·1 answer
  • A rectangular fish pond is 21 ft2 in area. If the owner can surround the pond with a 20-foot fence, what are the dimensions of t
    10·1 answer
  • Factor this polynomial expression.
    9·1 answer
  • A company sells a mix of peanuts and cashews. For every 3 ounces of peanuts, there are 2 ounces of cashews. A batch has 60 ounce
    8·2 answers
  • What number is 40% of 90?
    10·2 answers
  • CAN SOMEONE PLEASE SHOW WORK FOR THESE PROBLEMS WILL GIVE BAINLIEST!!!!!!!!!EMERGENCY
    9·1 answer
  • Use the drop-down menus to complete the statements.
    5·1 answer
  • The difference between 3 times a number x and 2 is 19. What is the value of x? ​
    12·1 answer
  • Which rate is not a unit rate
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!