Answer:
b = 104/75 = 1 29/75 = 1.386666667
Step-by-step explanation:
5b−6+14(5b−6)+2=14+2
Use the distributive property to multiply 14 by 5b−6.
5b−6+70b−84+2=14+2
Combine 5b and 70b to get 75b.
75b−6−84+2=14+2
Subtract 84 from −6 to get −90.
75b−90+2=14+2
Add −90 and 2 to get −88.
75b−88=14+2
Add 14 and 2 to get 16.
75b−88=16
Add 88 to both sides.
75b=16+88
Add 16 and 88 to get 104.
75b=104
Divide both sides by 75.
b=104/75
Answer:
a. Smart Dot Company: C = 12 + 0.5·t
Communications Plus: C = 2.5·t
b. Please find attached the required tables created using MS Excel cell function tool
c. Please find attached the graph of both relationship created on the same grid with
Step-by-step explanation:
a. The monthly cost of the Smart Dot Company = $12
The hourly cost for internet use on Smart Dot Company = $0.50
The hourly cost of using the Communications Plus = $2.50
Therefore, the total monthly cost, <em>C</em>, for the duration of hours used, <em>t</em>, is given as follows;
Smart Dot Company: C = 12 + 0.5·t
Communication Plus: C = 2.5·t
b. The table of values are created using MS Excel as follows;

c. Please find attached the graph of both relationship created on the same grid with MS Excel
Answer:
Since
, the difference is significant.
Step-by-step explanation:
Z-score:
In a set with mean
and standard deviation
, the zscore of a measure X is given by:
The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.
If |Z| > 2, the measure X is significent.
In this question:

So

Since
, the difference is significant.