What is the area of the rectangle 21 m 33 m 21 m

What is sin 7x/4 ? i need on this urgent trig

Find the difference (8ab+a+2) - (3ab+6)

Its due 1. what is the product of 1/2-1/4? write your answer in standard form.a) show your work.b) is the product of 1/2x-1/4 and 5x^2-2x+6 equal to product of 1/4x-1/2 and 5x^2-2x+6? explain your answer.