If 7 gallons of fertilizer are needed for each acre of land, find the number of acres that can be fertilized with 1162 gallons of fertilizer

Me! #1 write an equation for the interior angles of this triangle that uses the triangle sum theorem. #2 what is the value of x? #3 what is the measure of #4 classify the triangle above as acute, obtuse, or right. state your reason in a complete sentence.

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

Any is very appreciated! (picture is provided below)not sure how to do this at all won't lie