If 12: x is equal to x: 3, find the value of x

0if x and y vary inversely and y=6 as x=7, what is the constant of variation?

The holiday party will cost $160 if 8 people attend.if there are 40 people who attend the party, how much will the holiday party cost

What is the value of the expression i 0 × i 1 × i 2 × i 3 × i 4? 1 –1 i –i