Which expressions are equivalent to 6x - 18 ?

What basic trigonometric identity would you use to verify that sin x cos x tan x =1-cos^(2)x?

Giuseppi's pizza had orders for $931.00 of pizzas. the prices were $21 for a large pizza, 514 for a medium pizza, and $7 for a small pizza. the number of large pizzas was two less than four times the number of medium pizzas. thenumber of small pizzas was three more than three times the number of medium pizzas. how many of each size of pizza were ordered?

Why did the ice arena get so hot after the big game (this is math related google it to find the paper