prep math,下周考，请帮忙

1.computing income tax R (  a country ) were to add 2% of one's annual income to the average of 100 units of R's currency and 1% of one's annuel's income. which is the formula for a person annuel income?

50+I/40

不明白题意

2. x,y>1intergers, is x a multiple of y?

3y²+7y=x ( this is the answer)

3. 132.000 divided by 11, no one is to be more than 10% greater than any other, what is the min?

A. 108,00    B. 10900    C. 11000  D. 11100

answer is C.

4. x>0, is the following in a correct order?

x²<1/x<2x ( this is the answer )

how could this be possible?