Given: a = {(2, 3), (5, 1), (-3, -2), (0, 3)} a is a subset of
1. n x r
2. r x n
3. n x n
4. r x r

A33 gram sample of a substance that's used to detect explosives has a k-value of 0.1473. n = noekt no = initial mass (at time t = 0) n = mass at time t k = a positive constant that depends on the substance itself and on the units used to measure time t = time, in days

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

Which graph represents the given linear function 4x+2y=3