Best method to solve quadratic equation x^2 +4x+3=0

Add the two expressions 3.8b - 7 and 2.9b + 9 enter your answer in simplified form

Abouncy ball is released from a certain height. on the first bounce, it travels 32cm. with each subsequent bounce, it travels 9/10 the distance of the previous bounce. what is the total distance that the ball has traveled when it completes its 25th bounce?

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)