Find x and rs if s is between r and t
rs=6x, st=12,and rt=72

Which of the following is the true for f(x) = 5cos

The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels

Jada has a meal in a restaurant she adds up the prices listed on the menu for everything they ordered and gets a subtotal of $42.00. when the check comes, it says they also need to pay $3.99 in sales tax. what percentage of the subtotal is the sales tax