22. each sport needs at least two teams so multiply 5x2 and 6x2 then add the numbers. 10+12=22
<span>2x + x = 12
=> x =12/3 =4
so, original number is 84.
</span>
18x
Simple as that. 18 times however many times she cuts the grass
Answer:
Lines BC and F represent perpendicular lines
Step-by-step explanation:
we have
<em>Line BC</em>

the slope of the line BC is 
<em>Line F</em>

the slope of the line F is 
we know that
If two lines are perpendicular, then the product of their slopes is equal to -1
so

we have
-----> slope line BC
-----> slope line F
Find the product of their slopes

therefore
Lines BC and F represent perpendicular lines