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Shamasen1
30.10.2019 •
Mathematics
Your balance is $42. you buy lunch every day for $1.80 and sometimes buy a snack for $0.85. after 20 days you have a balance of $0.05. how much snacks did you buy?
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Ответ:
The answer to your question is: I bought 7 snacks
Step-by-step explanation:
Data
beginning balance = $42 = b
lunch = $1.80 = l
snack = $ 0.85 = s
final balance = $0.05 = f
f = b - 1.8l - 0.05s
0.05 = 42 - 1.8l - 0.85s
After 20 days I spent = 1.8(20) in lunches = $36
0.05 = 42 - 36 - 0.85s
0.05 = 6 - 0.85s
0.05 - 6 = -0.85s
-5.95 = -0.85s
s = -5.95/-0.85
s = 7
Ответ:
f(x) =x
Step-by-step explanation:
f(x) = -3x+2
This is a line so the parent function must be a line
That eliminates a which is a cubic function and d which is a absolute value functions
[x] means greatest integer which is not what the type of graph we are making
The parent function is x