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
faltersainse [42]
3 years ago
9

A 1lb box costs .50 to mail through the postal service. a 3lb box cost .92 to mail through the postal service. the postal servic

es calculates the weight to the whole pound. what functions represent the total cost f(x), to send a letter that is x pounds? select all that apply.
A- f(x)=0.21(x-1)+0.50
B- f(x)=0.50(x-1)+0.21
C- f(x)=0.50x
D- f(x)=0.21x+0.29
E- f(x)=0.21x
Mathematics
1 answer:
ser-zykov [4K]3 years ago
5 0

Answer:

- f(x)=0.50(x-1)+0.21

You might be interested in
Given that 2y^3+by-cy+d,where b,c and d are constants,leaves a remainder R when divided by (y+1) , (y-2) and (2y-1). Find the va
Eddi Din [679]

The polynomial remainder theorem says that a polynomial <em>p(x)</em> leaves a remainder of <em>p(k)</em> when it's divided by <em>x</em> - <em>k</em>.

We're given that dividing <em>p(y)</em> = 2<em>y</em>³ + <em>by</em>² - <em>cy</em> + <em>d</em> leaves the same remainder <em>R</em> after dividing it by <em>y</em> + 1, <em>y</em> - 2, and 2<em>y</em> - 1. So we have

<em>p</em>(-1) = 2(-1)³ + <em>b</em>(-1)² - <em>c</em>(-1) + <em>d</em> = <em>R</em>

==>  <em>R</em> = -2 + <em>b</em> + <em>c</em> + <em>d</em>

<em>p</em>(2) = 2(2)³ + <em>b</em>(2)² - <em>c</em>(2) + <em>d</em> = <em>R</em>

==>  <em>R</em> = 16 + 4<em>b</em> - 2<em>c</em> + <em>d</em>

<em>p</em>(1/2) = 2(1/2)³ + <em>b</em>(1/2)² - <em>c</em>(1/2) + <em>d</em> = <em>R</em>

==>  <em>R</em> = 1/4 + <em>b</em>/4 - <em>c</em>/2 + <em>d</em>

<em />

We're also given that <em>y</em> + 2 is a factor, which means dividing <em>p(y)</em> by it leaves no remainder, and so

<em>p</em>(-2) = 2(-2)³ + <em>b</em>(-2)² - <em>c</em>(-2) + <em>d</em> = 0

==>  0 = -16 + 4<em>b</em> + 2<em>c</em> + <em>d</em>

<em />

Solve the system of equations in boldface. You can eliminate <em>d</em> from the first 3 to first solve for <em>b</em> and <em>c</em>, then solve for <em>d</em> :

(-2 + <em>b</em> + <em>c</em> + <em>d</em>) - (16 + 4<em>b</em> - 2<em>c</em> + <em>d</em>) = <em>R</em> - <em>R</em>

-18 - 3<em>b</em> + 3<em>c</em> = 0

<em>b</em> - <em>c</em> = -6

(-2 + <em>b</em> + <em>c</em> + <em>d</em>) - (1/4 + <em>b</em>/4 - <em>c</em>/2 + <em>d</em>) = <em>R</em> - <em>R</em>

-9/4 + 3<em>b</em>/4 + 3<em>c</em>/2 = 0

<em>b</em> + 2<em>c</em> = 3

(<em>b</em> - <em>c</em>) - (<em>b</em> + 2<em>c</em>) = -6 - 3

-3<em>c</em> = -9

<em>c</em> = 3

<em>b</em> - 3 = -6

<em>b</em> = -3

-16 + 4(-3) + 2(3) + <em>d</em> = 0

<em>d</em> = 22

7 0
3 years ago
Find the pattern. What numbers come next?
rusak2 [61]
The answer is B. It is increasing by 9 each time.
6 0
2 years ago
jennifer earns 720.00 per week alex earn 3/4 of what jennifer earns per week how much does alex earn per week
Paladinen [302]

Answer:

alex earns 540.00

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Help me solve please
Elodia [21]
1. X = 83
2. X = 101
3. X = 24
3 0
3 years ago
What are some equivalent exspressions to <img src="https://tex.z-dn.net/?f=%5Cfrac%7B%283%5E%7B2%7D%29%5E%7B3%7D%20%7D%7B3%5E%7B
Andrew [12]

Answer:

kitkat

Step-by-step explanation:

kitkat

5 0
2 years ago
Other questions:
  • A hiker descends from a mountain peak. If the hiker descends at a rate of 700 feet every half hour, what is the hiker's elevatio
    14·2 answers
  • Line segment Xy has endpoints x(5,7) and y(-3,3). Find the equation for the perpendicular bisector of line segment xy
    7·1 answer
  • Jason unfolded a cardboard box. The figure of the unfolded box is shown below: Which calculation will give the total surface are
    7·1 answer
  • Rita deposits $800 into an account that pays simple interest at a rate of 3% per yearHow much interest will she be paid in the f
    15·1 answer
  • 38 + 7k=8(k + 4)<br><br> Please help. &lt;3
    13·2 answers
  • He greatest common factor. 46x^5. 10x^3
    12·1 answer
  • A rocket is launched with an initial upward velocity of 320 feet per second from an initial height of 15 feet.
    14·1 answer
  • Please complete it (picture)​
    9·1 answer
  • Justin's recipe for banana pancakes includes 0.8 cups of flour to 3 bananas to 1 egg. If Justin wants to cook using 18 bananas,
    13·1 answer
  • What is...<br> 5 times 6 plus 45 minus 67 divided by 78635 times 8273 plus square root of 6
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!