81 - 8^2 is 17 ..............
3: 3,6,9,12,15,18,21,24,27
7: 7,14,21,28,35
Answer:
The square root of -16 is 4 i
The expression is not factorable with rational numbers.
The area of a triangle can be calculated through the equation,
A = bh / 2
where A is area, b is base, and h is height.
Substituting the known values from the given above to the equation
A = (14 in)(6 in) / 2 = 42 in²
Since, there are five of these triangles, the total area is,
total area = 5(42 in²) = 210 in²
Thus, the total area of the plywood needed is 210 in².