I found x by doing cross multiplication. But I’m not sure how to find Y. Can anyone help?

Which of the following is a function? a.) {(-2, -4/5), (-1,-,,-1)} b.) {(-2,,1/,3/,1)} c.) {(-22)} d.) {(-21)}

15m is what percent of 60m; 3m; 30m; 1.5 km? the last one is km not m

Drag each equation to the correct location on the table. for each equation, determine the number of solutions and place on the appropriate field in the table.