Please help i’m having a hard time answering it

Jordan got 27 out of 90 correct on his test . what fraction of the marks did her get correct

Which of the following is best modeled using a linear equation y=ax+b, where a is less than 0?

The length of a rectangular plot of land is given by the expression 6x^3y^4. the width of the plot is given by the expression 5x^5y^4z. find an expression to represent the area of the rectangular plot.