Describe the transformations that maps triangle a to triangle a

An arc subtends a central angle measuring 7pi/4 radians what fraction of the circumference is this arc?

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

In an equilateral triangle, each angle is represented by 5y+3. what is the value of y? a. 9.7 b. 10.8 c. 11.4 d. 7.2