Answer:
Step-by-step explanation:
To find the surface area of a regular pyramid use the formula:
S = 1/2 × l × p + b
Surface = 1/2 × lateral height × perimeter of the base + area of the base
I believe you set them equal to each other.
2x+4=5x-9
x=4.3
2(4.3)+4=12.6
I think the answer is 12.6
6.1 units is the correct answer
Step-by-step explanation:
1. b + 2
2. x - 2
3. 2z
4. a ÷ 2
5. y^2
Answer:
The equivalent trigonometric ratio in Quadrant I is 
Step-by-step explanation:
The terminal side of 
is in the 3rd quadrant.
The principal angle is 
In other words, the terminal side of makes an acute angle of radian with the positive x-axis. Acute angles are in the first quadrant.
Since the cosine ratio is negative in the 3rd quadrant,
