See my comments . I think the answer might be D 25
Answer:
2√10
I hope i am right
Step-by-step explanation:

It is 512 because you have to multiple 64x8=512 you should have figure that out and add 512+2=514 do you get it now ?
Answer:
x = - 12/11
Step-by-step explanation:
Multiply by LCM (or LDC if you like that term better)
2 & 3 LCM = 6
6(3/2) x + 6(1/3)x + 5*6 = 3*6
9x + 2x + 30 = 18
11x = - 12
x = - 12/11