Hello!
To solve, we want to isolate the x on one side of the equation. We can use inverse operations to put numbers on the other side to find x.
First we undistribute our parentheses.
12x-66+15=21
We subtract 15 from both sides (it cancels out the 15 on the left side, making it 0).
12x-66=6
Now we add 66 to both sides, as -66+66=0
12x=72
Finally, we divide both sides by 12.
x=6
I hope this helps!
Answer:
3 is 15 degrees and 1 is 67 degrees
Answer:
Area of the square pyramid = 
Step-by-step explanation:
The Surface area of the square pyramid :
Area of the four triangular faces+ Area of the square base
For triangle:
Side of the square base= 
Area of the figure is:
The area of the square pyramid is :
