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
EastWind [94]
3 years ago
12

Which equations models this problem?

Mathematics
1 answer:
kherson [118]3 years ago
5 0
A, because in order to find the price for each unit you must divide the total price by the number of units bought and 9p=54.90 you would end up dividing both sides by nine which would then get you to find the price of each unit
You might be interested in
Would someone Please answer this question please will be thanked and also will pick brainly!! (please be honest)
Hoochie [10]
6 units because the x values are the same but the difference of the y values is equal to 6 when on a graph.
8 0
3 years ago
Read 2 more answers
Charles has 9 times as many red marbles as blue marbles.
djyliett [7]

Answer:

  • 314 red marbles

Step-by-step explanation:

Red = r, blue = b,

  • r = 9b
  • r = b + 288

Substitute:

  • 9b = b + 288
  • 8b = 288
  • b = 288/8
  • b = 26

Red marbles:

  • r = 288 + 26 = 314
6 0
3 years ago
(Based on Q1 ~ Q3) According to the Bureau of the Census, 18.1% of the U.S. population lives in the Northeast, 21.9% inn the Mid
vekshin1

Answer:

We can therefore conclude that the geographical distribution of hotline callers could be the same as the U.S population distribution.

Step-by-step explanation:

The null Hypothesis: Geographical distribution of hotline callers could be the same as the U.S. population distribution

Alternative hypothesis: Geographical distribution of hotline callers could not be the same as the U.S. population distribution

The populations considered are the Midwest, South, Northeast, and west.

The number of categories, k = 4

Number of recent calls = 200

Let the number of estimated parameters that must be estimated, m = 0

The degree of freedom is given by the formula:

df = k - 1-m

df = 4 -1 - 0 = 3

Let the significance level be, α = 5% = 0.05

For  α = 0.05, and df = 3,

from the chi square distribution table, the critical value = 7.815

<u>Observed and expected frequencies of calls for each of the region:</u>

<u>Northeast</u>

Observed frequency = 39

It contains 18.1% of the US Population

The probability = 0.181

Expected frequency of call = 0.181 * 200 = 36.2

<u>Midwest</u>

Observed frequency = 55

It contains 21.9% of the US Population

The probability = 0.219

Expected frequency of call = 0.219 * 200 =43.8

<u>South</u>

Observed frequency = 60

It contains 36.7% of the US Population

The probability = 0.367

Expected frequency of call = 0.367 * 200 = 73.4

<u>West</u>

Observed frequency = 46

It contains 23.3% of the US Population

The probability = 0.233

Expected frequency of call = 0.233 * 200 = 46

x^{2} = \sum \frac{(O_{i} - E_{i})  ^{2} }{E_{i} } ,   i = 1, 2,.........k

Where O_{i} = observed frequency

E_{i} = Expected frequency

Calculate the test statistic value, x²

x^{2} = \frac{(39 - 36.2)^{2} }{36.2} + \frac{(55 - 43.8)^{2} }{43.8} + \frac{(60 - 73.4)^{2} }{73.4} + \frac{(46 - 46.6)^{2} }{46.6}

x^{2} = 5.535

Since the test statistic value, x²= 5.535 is less than the critical value = 7.815, the null hypothesis will not be rejected, i.e. it will be accepted. We can therefore conclude that the geographical distribution of hotline callers could be the same as the U.S population distribution.  

7 0
3 years ago
20 points!<br><br> If a translation maps ∠D onto ∠B, which of the following statements is true?
madam [21]
C
The two triangles are similar — that is, the three angles in triangle EDC correspond to those in ABC
5 0
3 years ago
Read 2 more answers
What fraction is equal to the decimal 0.4?
Sholpan [36]
<span>Step 1: 0.4 = 4⁄10</span>
<span>Step 2: Simplify 4⁄10 = 2⁄5</span>             
4 0
3 years ago
Read 2 more answers
Other questions:
  • WILL GIVE BRAIN PLEASE HELP ASAP
    15·1 answer
  • What is the surface area of a box if it scaled up by 10
    14·1 answer
  • A board game has 25 cards. Each card is printed with a number from 1 through 25. Sameer shuffled the cards, and then selected 1
    10·2 answers
  • HURRY PLS!! Jacob and kerrie are trying to figure out how long they can live off their 84,670 savings if they spend 370 each mon
    11·2 answers
  • 12(3-x)=48<br> plllllzzzz
    12·2 answers
  • Jemma has 24 balls. Out of the 24 balls, 12 are yellow, 4 are pink, and the rest are red. What is the ratio of the number of red
    14·2 answers
  • 1) What are the real zeroes of x3 + 6 x2 – 9x – 54?
    7·2 answers
  • 51) Simplify: 4x + 6(3x - 2)
    13·2 answers
  • Pierre is an artist. Last week he bought 5 brushes and 6 tubes of paint for $43. This week he bought 12 tubes
    10·1 answer
  • For babysitting Nicole charges a flat fee of $10 plus $7 per hour right now equation represents the amount of money Nicole makes
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!