A) Sin(3x)= (sin(x)) (1-8sin'(x)cos-(x))

Evaluate the expression for the given value of the variable 7a - 4a for a =8

Atriangle has a side lengths of 18cm, 80 cm and 81cm. classify it as acute obtuse or right?

Boris needs to buy plastic spoons. brand a has a box 42 spoons for $2.37. brand b has a box of 72 spoons for $3.57. find the unit price for each brand. then state which brand is the better buy based on the unit price. round your answer to the nearest cent.