You know the mean cost is calculated from ...
... (mean cost) = (total cost)/(number of items)
You are given the mean cost and the number of items, so you can find the total cost for the 8 items as ...
... (mean cost)×(number of items) = (total cost)
... 8 × $3.05 = (total cost) = $24.40
You are given the costs of 7 of the items so ...
... (total cost) = (8th item cost) + (total cost of 7 items)
Then we can find the (8th item cost) as ...
... (8th item cost) = (total cost) - (total cost of 7 items)
Adding up the given cost of the 7 items, we get ...
... (total cost of 7 items) = $20.57
... (8th item cost) = $24.40 -20.57 = $3.83
The price of the 8th item in the bag was $3.83.
Functions cannot have the same X value (the first number), but they can have the same Y value (the second number).
<span>A. {(1,2),(2,3),(3,4),(2,1),(1,0)}
B. {(2,−8),(6,4),(−3,9),(2,0),(−5,3)}
C. {(1,−3),(1,−1),(1,1),(1,3),(1,5)}
D. {(−2,5),(7,5),(−4,0),(3,1),(0,−6)}
Choice A. has two repeating X values [(1,2) and (1,0), (2,3) and (2,1)]
Choice B. has one repeating X value [(2, -8) and (2,0)]
Choice C. all has a repeating X value (1)
Choice D doesn't have any repeating X values.
In short, your answer would be choice D [</span><span>{(−2,5),(7,5),(−4,0),(3,1),(0,−6)}] because it does not have any repeating X values.</span>
(a) If we let x be the number of miles and y be the total cost, the equation for relating the number of miles and the total cost would be,
y = 0.4x + 48
(b) If the rental cost is 60,
60 = 0.4x + 48
The value of x from the equation is 30.
(c) You may prepare the table of values by allowing x be any number and then solve for y until we arrive with an answer for y being equal to 60.
Answer:
The total monthly cost would be $214
explanation:
They gave us 1,250, which is half of 2,500. multiplication:
1,250 = 2,500
107 = x
2 × 1,250 = 2,500
2 × 107 = 214
Therefore, the total monthly cost if the cell phone is used for 2,500 minutes is $214.
