(x^2+5)=7 and (x^2+5)k=21, what is the value of k?

Ammonia molecules have three hydrogen atoms and one nitrogen atom.how many of each atom arein five molecules of ammonia

Suppose a store sells an average of 80 cases of soda per day. assume that each case contains 24 cans of soda and that the store is open 10 hours per day. find the average number of soda that the store sells per hour.

15 there is a line that includes the point 0,10 and has a slope of 7/4. what is it’s equation in slope intercept form