PLEASE HELP Classify each angle as acute, obtuse right or straight

(also please do not answer if you do not know so the people who do know get the points)

What is the value of x when x + 7 = 21?

What is the slope of any line parallel to the line 8x+9y=3 in the standard (x,y) coordinate plane?

Ican interpret and represent the remainder in division calculations sensibly for the context (eg 27.4 in calculating average height in cm: $27.44 if it represents an amount of money) solve the following problems. 15) the wildlife park charges $25.50 dollars per person to enter their park if the park made $15096 dollars today, how many people entered the park? 16) ms adams plus 2,230 other keen runners ran a marathon: between them they ran 94817.5km. how many km did each competitor run?