X-y=-2 and 2x+2y=12 i’m doing matrix and i need doing elimination, substitution and matrix for my grade

Apatient is given 50 mg dose of medicine the medicines effectiveness decreases every hour at a constant rate of 40% what is the exponential decay function that models this scenario how much medicine will be left in the patients system after 2 hours

List the sides of δrst in in ascending order (shortest to longest) if: a ∠r =x+28°, m∠s = 2x+16°, and m∠t = x+12°

The side of a square is 3 and 5/2 inches