You can put "3 or 4" which is in your multiple choice :)
1. Linear Pair Postulate
2. Angle 2
3.Angle 3
4.Angle Congruence Postulate
The total area is 78 sq. ft.
Since the medal platform has different measurements, we need to individually compute the area of each polygon.
The top polygon is a square. Its sides measure 3 ft.
A₁ = a²
A₁ = 3 ft²
A₁ = 9 ft²
The middle polygon is a rectangle.
Its total width can be derived by adding the widths given and the width of the square above.
w = 3 ft + 3 ft + 3 ft
w = 9 ft
A₂ = width * height
A₂ = 9 ft * 2 ft
A₂ = 18 ft²
The bottom polygon is also a rectangle.
w = 4 ft + 9 ft + 4 ft
w = 17 ft
A₃ = width * height
A₃ = 17 ft * 3 ft
A₃ = 51 ft²
Total Area = A₁ + A₂ + A₃
T.A. = 9 ft² + 18 ft² + 51 ft²
T.A. = 78 ft²
Answer:
Conclusion: x = 0
Step-by-step explanation:
given: If a ● b = 0, then a = 0 or b = 0
then for 3x = 0, either 3 = 0 (not possible because 3 is obviously not zero) or x = 0 (answer)
The key idea here is that
speed of plane in wind = (speed of plane in air) + (speed of wind)
Let
be the speed of the plane in still air, and
the wind speed. A tailwind blows in the same direction as the plane, so for the first leg of the trip, we have

For the return trip, the wind would blow in the opposite direction:

Solve this system and you'll find
and
.