If x is the number of units, 600x dollars is the cost of manufacturing all the units, and 900x dollars is the revenue of the sales. Break even is when the cost=revenue. 200000+600x=900x. 300x=200000, x=200000/300=2000/3=667 approx. There is a small profit of $100 but 666 units actually incurs a loss of $200. The break-even seems to be 667 units.
The answer is A, 75 degrees add all like terms 2x+196 all triangles equal 180 degrees 2x+196=180 subtract the 196 from 180 2x= -16 divide x= -8 plug into angle A -8+83 A=75