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3 years ago

Algebra, please help. 2 phone companies prices.

Mathematics

1 answer:

nordsb [41]3 years ago

3 0

Answer:

At 10 minutes the phone call costs the same for both companies. Hopefully this was helpful. :)

Step-by-step explanation:

Create equation:

f(x)=3x+35

f(x)=2x+45

x=minutes

Solve:

Company A: Company B:

0 35 45

1 38 47

2 41 49

3 44 51

4 47 53

5 50 55

6 53 57

7 56 59

8 59 61

9 62 63

10 65 65

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One more, again I aplolgize!

oksano4ka [1.4K]

Answer:

I would say it is D

Step-by-step explanation:

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3 years ago

can somebody tell me why i just went on my sons phone and found this app??!?! is he cheating on his home work?!?

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3 years ago

Read 2 more answers

Surveys tend to suffer from low response rates. Based on past experience, a researcher determines that the typical response rat

devlian [24]

Answer:

Step-by-step explanation:

First let's define the different bias that exist:

Sampling bias: This bias occurs when the method used to get the sample favours one part of the population leaving another part of the population excluded.

Non response bias: This bias occurs when the people who do not answer the survey have different opinions from the ones who do.

Response bias: This bias occurs when the answer given to the survey does not reflect the true feelings of the person who responds.

Now back to the problem:

The researcher sent the survey to 2000 randomly selected e-mail addresses, she expects to get 20% of responses, meaning 400 people will answer the survey.

Given these conditions, we would expect the survey to be biased. We have approximately 1600 people who didn't answer the survey so it is possible that all these people who didn't answer have different opinions from the 400 who did (non response bias), given that the survey was done by email it could also happen that people do not tell the truth when asked about a topic (response bias), also, there would be sampling bias because the people who she selected have an email address so the people who don't use email get excluded from the survey (sampling bias)

6 0

3 years ago

1. Quadrilateral EFGH is an isosceles trapezoid. If mG is four times mH, what is mE? A)18° C)72° D)144° B)36°

Maslowich

Answer:

<E = 36 degrees (Answer B)

Step-by-step explanation:

Recall that the addition of all internal angles in a quadrilateral must equal 360 degrees. Then we can write the equation that states this as:

<E + <F + <G + <H = 360

Notice as well that we are dealing with an isosceles trapezoid, so there is a symmetry along the line that passes through the midpoints of sides FG and EH (the two bases). That means that the measures of angles <F = <G and <E = <H .

The previous equation then can be written as:

<H + <G + <G + <H = 360

Also, since we are told that <G = 4 <H, we can use this info in the equation as shown below:

<H + 4 <H + 4 <H + <H = 360

10 <H = 360

divide both sides by 10 to isolate <H

<H = 360 / 10

<H = 36

Since as we mentioned, <E equals <H, we can state that

the measure of <E = 36 degrees (Answer B)

3 0

3 years ago

A florist offers three sizes of flower arrangements containing roses, daisies, and chrysanthemums. Each small arrangement contai

mash [69]

Answer:

The number of arrangements she made was:

2 small arrangements

3 medium arrangements

4 large arrangements

Step-by-step explanation:

There are 3 sizes of arrangement

Let r = roses

d = daisies

c = chrysanthemums

Each small arrangement contains one rose, four daisies, and four chrysanthemums.

r + 4d + 4c

Each medium arrangement contains two roses, four daisies, and five chrysanthemums.

2r + 4d + 5c

Each large arrangement contains four roses, six daisies, and six chrysanthemums.

4r + 6d + 6c

We are told that

One day, the florist noted that she used a total of 24 roses, 44 daisies, and 47 chrysanthemums in

Rearranging the equations,

Where s = small arrangements

m = medium arrangements

l = large arrangements

we have:

s + 2m + 4l = 24 ........Total number of roses

3s + 4m + 8l = 50 ....... Total number of daisies

3s + 6m + 6l = 48 ......... Total number of Chrysanthemums

From the above:

We can see that we have 3 equations and to solve it, we use Matrix method to solve this question because this is a 3 system (3 × 3) Matrices

I am unable to type the Matrices solution here, so please find it attached to this answer.

The number of arrangements she made was:

2 small arrangements

3 medium arrangements

4 large arrangements

7 0

3 years ago