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bnn29
12.09.2021 •
Mathematics
A young mother is attempting to clean the house while her 2 children, ages 5 and 2, play in the living room. The older child begins feeding lego bricks to the younger at a constant rate. Below is a chart of how many bricks remain yet to be consumed after a given number of minutes.
Time (minutes): 4 6 11 17
Bricks remaining: 75 69 54 36
How many lego bricks were there before the un-attentive mother began cleaning?
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Ответ:
87
Step-by-step explanation:
f(x) = ax + b
f(4) = 75 => 4a+b = 75
f(6) =69 => 6a+b = 69
-
-2a = 6
a = 6/-2 = -3
4a + b = 75
4(-3) +b=75
-12+b = 75
b = 75+12
b = 87
the number of lego bricks before the mother began cleaning = 87
Ответ:
6*3=M
18=M