Find the value of r (r,6) and (4,8) m=2

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

Two corresponding sides of two similar triangles are 3cm and 5cm. the area of the first triangle is 12cm2. what is the area of the second triangle?

Gabrielle's age is three times mikhail's age. the sum of their ages is 40 . what is mikhail's age? __ years old