The box plot on this page shows the total amount of time, in minutes, the students of a class surf the Internet every day:
2 answers:
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ANSWER
EXPLANATION
From the table,
There is a constant difference of
The sequence is therefore an arithmetic progression.
The general formula for the arithmetic progression is
We substitute the values into the formula to obtain,
We expand the bracket to obtain,
This simplifies to
EXPLANATION
From the table,
There is a constant difference of
The sequence is therefore an arithmetic progression.
The general formula for the arithmetic progression is
We substitute the values into the formula to obtain,
We expand the bracket to obtain,
This simplifies to
Answer:
9 m
Step-by-step explanation:
∠CAB = 90° -∠ABC = 90° -30° = 60°
Since AL bisects angle A, we have ...
∠LAC = ∠LAB = 60°/2 = 30°
Then ∠BAL = ∠ABL = 30° and ΔABL is isosceles with AL = LB = 18 m.
The 30°-60°-90° triangle ALC has sides in the ratio ...
CL : CA : AL = 1 : √3 : 2
so
CL/AL = 1/2
CL = AL/2 = (18 m)/2 = 9 m
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It can help to draw a diagram
