A theater has 15 rows of seats with 25 seats in each row. If 19 of the seats are vacant , how many are taken?
1 answer:
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Step
<u>Find the slope of the given line</u>
Let
slope mAB is equal to
Step
<u>Find the slope of the line that is perpendicular to the given line</u>
Let
CD ------> the line that is perpendicular to the given line
we know that
If two lines are perpendicular, then the product of their slopes is equal to
so
Step
<u>Find the equation of the line with mCD and the point (3,0)</u>
we know that
the equation of the line in the form point-slope is equal to
Multiply by both sides
therefore
the answer is
the equation of the line that is perpendicular to the given line is the equation
The number of permutations of the 4 different letters, taken two at a time, is given by:
