1. As M is the midsegment JM / JK = 1/2
By similar triangles JM/JK = 1/2 = x / 12
2x = 12 so x = 6 answer
2. By the same reasoning as above
x / (x + 9 ) = 8.5 / 17 = 1/2
2x = x + 9
x = 9
Answer x = 9
B

5,000
because the library has more than or = to 5000 books.
Answer:
x = 6 and -6
Step-by-step explanation:
x²-36 = 0
isolating x
x²-36+36 = 0+36
x²=36
√x² = √36
x = ±6