Aliaa got a mark of 60 in her first 4 tests, so her total mark is 60 x 4 = 240. On her fifth test, she got a mark of 80.
So her average is:
(240+80)/5 = 320/5 = 64
Her avg is 64 (c).
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
Horizontal asymptotes are horizontal lines the graph approaches.
hope this helps :))
The lowest possible fraction is 3/4 because 0.75=75/100 then you divide both terms by 25 and get 3/4
Answer:
it'll take 251,991 tons of ore to obtain 126 tons of gold.. That's a lot