Problem 2 Example 2: Bruno spends $23 at the arcade. He purchased two drinks and spent $17 on games. What was the cost of each d
2 answers:
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Answer: $19.6
Step-by-step explanation:
Linear function: f(x)=mx+c
, where m= rate of change in f(x) with respect to x.
c = Initial value.
Let c = Initial value of card , m= Charge per minute
x= Number of minutes calling time.
Then, 25.06= 38m+c (i)
21.03=69m+c (ii)
Eliminate (ii) from (i)
Put m in (i) , we get
i.e. f(x)=-0.13x+30
if x=80 then
f(80)= -0.13(80)+30
=-10.4+30
=19.6
Hence, the remaining credit after 80 minutes of calls = $19.6
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Let A = area
Let w = width
Let (w + 5) = length
A = (w + 5)w
Let A = area
Let w = width
Let (w + 5) = length
A = (w + 5)w