You add 13 and 8 it gets 21 so for X its 13
sheesh these are easy its 4
B) sunlight travels through space - there is nothing to bounce off of until it hits an atmophere
The answer would be 36.
Following PEMDAS, you'd solve what's in the parenthesis first. 2^2 = 4 and 3^2 = 9. This leaves you with 10 + (4 + 9) x 2. Add 9 and 4 to get 13, and then the parenthesis are done.
Next, you'd multiple 13 and 2 (since it's the next step in PEMDAS) to get 26.
Finally, you add together 10 and 26 to get the answer, which is 36.
I hope this helps!
