(accidentally typed it wrong the last time)
use the following recursive formula to answer the question.
a1=−3/2
an=an−1+1/2
what is a9?

The trigonometric ratios sine and secant are reciprocals of each other

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. 4x^2 + 20x + 25 = 0

When you have 25 numbers, and jake picks 3 random numbers and puts them back, what is the chance bob has of picking those 3 numbers when he picks 6 random numbers (without putting them back)? explain.