Answer: (x+2)
Step-by-step explanation:
Using a linear function, the correct option regarding the situation is given by:
C) 57 ≤ 1.28x + 38 ≤ 87; To stay within the range, the usage should be between 14.8 and 38.3 HCF.
<h3>What is a linear function?</h3>
A linear function is modeled by:
y = mx + b
In which:
- m is the slope, which is the rate of change, that is, by how much y changes when x changes by 1.
- b is the y-intercept, which is the value of y when x = 0, and can also be interpreted as the initial value of the function.
The bill is modeled by a linear function, with an <u>intercept of $38 and a slope of $1.28</u>, hence it is given by:
C(x) = 1.28x + 38
The bill should be between $57 and $87 dollars per month, hence:
57 <= C(x) <= 87.
The values of x are:
C(x) >= 57
1.28x + 38 >= 57
x >= 19/1.28
x >= 14.8.
C(x) >= 87
1.28x + 38 >= 87
x >= 49/1.28
x >= 38.3.
Hence option C is correct.
More can be learned about linear functions at brainly.com/question/24808124
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Step-by-step explanation:
Add 8n to both sides to get
8n-67 = 5
then add 67
8n = 5+67 = 72
divide by 8
n = 9
The equation of the line is:
y + 4 = 5(x - 0) [point-slope form]
y = 5x - 4 [slope-intercept form]
<h3>How to Find the Equation of a Line?</h3>
Using the point-slope form, the equation of a line that has a slope of m, and passes through a point (a, b), can be written as: y - b = m(x - a).
Given the following:
Slope (m) = 5
Point on the line (a, b) = (0, -4)
Substitute m = 5 and (a, b) = (0, -4) into y - b = m(x - a)
y - (-4) = 5(x - 0)
y + 4 = 5(x - 0)
Or rewrite in slope-intercept form as:
y + 4 = 5x
y = 5x - 4
Learn more about the equation of a line on:
brainly.com/question/13763238
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Answer:
I think it's A hope this helps