Who could help me solve this?

Y=log x

If y=10, then what is x?

Which expression is equivalent to7_/x^2 ÷ 5_/y^3? assume y# 0

In the diagram of circle o, what is the measure of zabc?

Worth 100 points need the answers asap first row -x^2 2x^2 (x/2)^2 x^2 x is less than 2 x is greater than 2 x is less than or equal to 2 x is greater than or equal to 2 second row -5 -5/2 4 5 •2 is less than x& x is less than 4 •2 is less than or equal to x & x is less than or equal to 4 •2 is less than or equal to x& x is less than 4 •2 is less than x& x is less than or equal to 4