Help,anyone can help me do quetion,I will mark brainlest.
2 answers:
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Answer:
From the graph, it is clear that the point of intersection is:
- (x, y) = (-4, -1)
And the x-coordinate of the point of intersection for the two lines is:
- x = -4
Step-by-step explanation:
- As we know that the solution of the system of equations is the point of intersection. Let us solve it.
Given the system of equations
solving the system of equations
subtracting 2x+y = -9 from 2x-5y = -3
so
solving for y
Divide both sides by -6
Divide both sides by 2
Thus, the x-coordinate of the point of intersection for the two lines below will be:
Also, the graph is attached.
From the graph, it is clear that the point of intersection is:
- (x, y) = (-4, -1)
And the x-coordinate of the point of intersection for the two lines is:
- x = -4
Answer:
a. Class width=4
b.
Class midpoints
46.5
50.5
54.5
58.5
62.5
66.5
70.5
c.
Class boundaries
44.5-48.5
48.5-52.5
52.5-56.5
57.5-60.5
60.5-64.5
64.5-68.5
68.5-72.5
Step-by-step explanation:
There are total 7 classes in the given frequency distribution. By arranging the frequency distribution into the refine form we get,
Class
Interval frequency
45-48 1
49-52 3
53-56 5
57-60 11
61-64 7
65-68 7
69-72 1
a)
Class width is calculated by taking difference of consecutive two upper class limits or two lower class limits.
Class width=49-45=4
b)
The midpoints of each class is calculated by taking average of upper class limit and lower class limit for each class.
Class
Interval Midpoints
45-48
49-52
53-56
57-60
61-64
65-68
69-72
c)
Class boundaries are calculated by subtracting 0.5 from the lower class limit and adding 0.5 to the upper class interval.
Class
Interval Class boundary
45-48 44.5-48.5
49-52 48.5-52.5
53-56 52.5-56.5
57-60 56.5-60.5
61-64 60.5-64.5
65-68 64.5-68.5
69-72 68.5-72.5