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
Liula [17]
2 years ago
6

BRAINLIEST HURRY HURRY By your cell phone contract, you pay a monthly fee plus some money for each minute you use the phone duri

ng the month. In one month, you spent 280 minutes on the phone, and paid $23.80. In another month, you spent 340 minutes on the phone, and paid $25.90.
Let x be the number of minutes you talk over the phone in a month, and let y be your cell phone bill, in dollars, for that month. Use a linear equation to model your monthly bill based on the number of minutes you talk over the phone.
This linear model’s slope-intercept equation is_______ .
If you spent 160 minutes over the phone in a month, you would pay _____.
If in a month, you paid $30.80 of cell phone bill, you must have spent _____ minutes on the phone in that month.
Mathematics
1 answer:
Anna11 [10]2 years ago
5 0

Answer:Y = Co + C*x.22.45 = Co + C*200,Co = 22.45 - 200C.29.65 = Co + C*350.Co = 29.65 - 350C. = 22.45 - 200C150C = 7.20, C = 0.048/min.Co = 22.45 - 200*0.048 = $12.85/mo. = Initial cost.Y = 0.048x + 12.85.2. Y = 0.048*110 + 12.85 = $18.13.3. 34.10 = 0.048x + 12.85, X = ?.

Step-by-step explanation:

You might be interested in
Stats To quality for a police academy, applicants are given a lest of physical Itness. Ihe scores are normallyDistributed with a
omeli [17]

Since we want just the top 20% applicants and the data is normally distributed, we can use a z-score table to check the z-score that gives this percentage.

The z-score table usually shows the percentage for the values below a certain z-score, but since the whole distribution accounts to 100%, we can do the following.

We want a z* such that:

P(z>z^*)=0.20

But, to use a value that is in a z-score table, we do the following:

\begin{gathered} P(zz^*)=1 \\ P(zz^*)=1-0.20=0.80 \end{gathered}

So, we want a z-score that give a percentage of 80% for the value below it.

Using the z-score table or a z-score calculator, we can see that:

\begin{gathered} P(zNow that we have the z-score cutoff, we can convert it to the score cutoff by using:[tex]z=\frac{x-\mu}{\sigma}\Longrightarrow x=z\sigma+\mu

Where z is the z-score we have, μ is the mean and σ is the standard deviation, so:

\begin{gathered} x=0.8416\cdot9+64 \\ x=7.5744.64 \\ x=71.5744\cong72 \end{gathered}

so, the cutoff score is approximately 72.

6 0
1 year ago
PLZ DO EXACTLY AS STATED, WILL GIVE BRAILIEST AND 30 POINTS!!
dsp73

Answer:

bro just did this on a TGA

Step-by-step explanation:

A. no solutions and a contradiction

B. infinate solutions and an identity

C. one solution and niether

3 0
2 years ago
Marika solved the equation (6x + 15)2 + 24 = 0. Her work is below. 1. (6x + 15)2 = –24 2. StartRoot (6 + 15) squared EndRoot = S
malfutka [58]

Answer:

There are no real solutions to this equation because the square root of a negative number is not real. So answer B

Step-by-step explanation:

11 0
3 years ago
Read 2 more answers
If x / 5 = y, what is 2x?
tino4ka555 [31]
<u>x / 5  =  y</u>

Multiply each side by  5 :    x  =  5y

Multiply each side by  2 :   <em>2x  =  10y</em>
6 0
3 years ago
The expression 4x^2represents<br> (4)(x)(x)<br> (4x)(4x)<br> (4)(x)(2)
Daniel [21]

The expression 4x^2represents 4.x.x

5 0
3 years ago
Other questions:
  • Am adult ticket at an amusement park cost $24.95 and a child’s ticket costs $15.95. A group of 10 people paid $186.50 to enter t
    12·2 answers
  • Best explained and CORRECT answer gets brainliest.
    14·1 answer
  • Which of the following statements correctly uses the distributive property?
    5·1 answer
  • What is median of this histogram
    13·1 answer
  • Five times a number is 40. What is the number?<br> equation: <br><br><br> n =
    13·1 answer
  • ZA and ZB are complementary. If m ZA = (x - 6) º<br> and m2B = (3x) °, find the value of x.
    7·2 answers
  • 600000+21345???????​
    8·1 answer
  • Y= x+14 , x+ 2y= 36, find x and y and show solution pls
    7·2 answers
  • If m ZABC = 130° and mZDBC = 30°.<br> then mZABD = [ ? ]°
    9·1 answer
  • Which items cost less than $3.75 per item?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!