Simplify. (2a^2-9b)(4a+b) a. 8a^3+36a^2b-2ab-9b^2 b. 8a^3+2a^2b-36ab-9b^2 c. 8a^3-34ab-9b^2 d. 8a^3-9b^2

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

Which statement accurately explains whether a reflection over the y-axis and a 270° counterclockwise rotation would map figure acb onto itself? a coordinate plane with figure acb with point a at 1, 1, c at 3, 4 and b at 5, 1 yes, a″c″b″ is located at a″(1, 1), c″(4, 3), and b″(1, 5) yes, a″c″b′ is located at a″(1, 1), c″(3, 4), and b″(5, 1) no, a″c″b″ is located at a″(1, 1), c″(4, 3), and b″(1, 5) no, a″c″b″ is located at a″(1, 1), c″(3, 4), and b″(5, 1)

Which expression is equivalent to 8(k + m) − 15(2k + 5m)?