Answer:
21 ft^2
Step-by-step explanation:
split area into two parts shown by the red line and add up both areas to find total area.
area = b×h/2
triangle 1 = (5×6)/2
=30/2
=15 ft^2
triangle 2 = (3×4)/2
=12/2
=6 ft^2
total area = 15+6
The correct option is D (-∞,-3)∪(-1,1)
Step-by-step explanation:
Given,
≤ 0
To find the solution.
The solution could be found if
≤ 0 and
3x+9 ≠ 0 [if the denominator is 0, it gives ∞ as solution]
Now,
≤ 0
or, (x+1)(x-1) ≤0
or, x ≤1 and x≤-1
Both of the above condition holds is x≤1
Again,
3x+9≠0
or, x≠-3
All the conditions gold for the values (-∞,-3)∪(-1,1)
Hence the correct option is D.
Answer:
the 2nd on (B)
Step-by-step explanation:
The x does not repeat