Question

Y2 + 30 ÷ x - 8 what is the value of the expression when x = 6 and y = 8?

Answer 1

Y2 + 30 ÷ x - 8 i think this y power 2 ??

8 power 2 + 30 ÷ 6 - 8 =

64 + 30 ÷ 6 - 8 =

64 +5- 8 = 61

we use first the power then the multiplication or division and the last addition and subtraction

Answer 2

Assuming that by Y2 you mean 2 * Y (I'd suggest flipping them for organizational purposes), you'd just plug in for the values.

So 2(8) + 30 ÷ 6 - 8. PEMDAS says we do the multiplication and division first.
This gives us 16 + 5 - 8 = 13.

Again assuming Y2 means 2 * Y in your equation, the answer is 13.