Find secx if tan^2x=1/2

The difference of 2 numbers is 21 and the quotient of the equation is 4 then what are the two numbers?

In a graph with several intervals o data how does a constant interval appear? what type of scenario produces a constant interval?

The salesperson earns a 5% commission on the first $5,000 she has in sales. the salesperson earns a 7.5% commission on the amount of her sales that are greater than $5,000. this month the sales person had $8,000 in sales. what amount of commission, in dollars, did she earn?