If angle a is 80 degrees, what is the measure of angle d? b
с
d
150°
Ob
80°
65°
Od
130°

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

Prove that the value of the expression 7^8–7^7+7^6 is divisible by 43.

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. x^2 - 4x - 5 = 0