Acar drives 50 miles east and then 40 miles due north. how long is the length of the diagonal

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

If sin(x) = 0 and cos(x) = 1, what is tan(x)?

Need asap. solve for the following inequality