What is the equation for the difference of three times a number and 4 is -19

Over the last 8 nights, elyse earned the following in tips: {105, 120, 84, 95, 100, 132, 140}. if she earns $140 a night for the next four nights, which measure of center would increase more, the mean or median?

Evaluate 3(a + b + c)squared for a = 2, b = 3, and c = 4. a. 54 b. 243 c.729 add solution .

Angles r and s are complementary. the measure of angle r is 31 degrees. which equation can be used to find angle s?