the most abundant element in earth’s continental crust, by weight, is _____. calcium silicon iron oxygen
2 answers:
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Answer:
The equation to find the cost of repairing a TV is:
y = 25x + 40
Step-by-step explanation:
We know that the slope-intercept form of the line equation is
where m is the slope or rate of change and b is the y-intercept
Given that the TV chairman charges $40 to come out to your house and check the TV plus $25 per hour of labor.
It means $40 is the y-intercept because it represents the starting point/condition of the repairman.
Let 'x' be the number of hours and y be the cost.
The rate of change = 25$ per hour of labor
- The rate of change can also be termed as the slope.
Thus, m = 25
Hence, the slope-intercept form of the line equation becomes
y = mx+b
substituting m = 25 and b=40
y = 25x + 40
Therefore, the equation to find the cost of repairing a TV is:
y = 25x + 40
Validation:
y = 25x + 40
putting x = 1 to determine the cost if labor works for 1 hour.
y = 25(1) + 40 = $65
putting x = 2 to determine the cost if labor works for 2 hours.
y = 25(2) + 40 = $95
Answer:
11 minutes.
Step-by-step explanation:
To find the median queing time from the cumulative frequency curve, we find
and trace it on the cumulative frequency curve.
From the graph, that total frequency is 100.
Half of this 50.
We trace the 50th item.
First locate 50 on the vertical axis and trace to the horizontal axis.
This corresponds to 11.
Note that each box is 0.5 units on the queing time axis.
