Answer:
Step-by-step explanation:
Step 1: Simplify both sides of the equation.
Step 2: Subtract 6x from both sides.
- 65x²+390x+585−6x=6x−6x
- 65x²+384x+585=0
For this equation: a=65, b=384, c=585
Step 3: Use quadratic formula with a=65, b=384, c=585
- x=−b±√b2−4ac/2a
- x=−(384)±√(384)2−4(65)(585)/
- 2(65)
- x=−384±√−4644/130
Therefore, There are no real solutions.
Answer: Josh sold 11 book shows and Jessica sold 198 books.
Look at the attachment for the work.

As we know, sum of interior angles of a triangle is 180°
that is ~
Hence, value of x is 9°