A woman owns 21 pets. Each of her pets is either a cat or a bird. If the pets have a total of 76 legs, how many cats and how many birds does the woman own?

The quadratic function h(t) = -16.1t^2 + 150 models a balls height, in feet, over time, in seconds, after its dropped from a 15 story building. from what height in feet was the ball dropped?

Need on this one asap im almost done with this subject

0if x and y vary inversely and y=6 as x=7, what is the constant of variation?