I have 10 questions to ask im in middle school 6th grade

What is the solution to the equation in the & show work i’m very

In angle pqr find the measure of

Which equation shows the quadratic formula used correctly to solve 5x2 + 3x -4 0 for x? cos -3+ v (3) 2-4() 2(5) 3+ |(3)² +4() 205) 3+ (3) 2-4() -3+ v (3)² +4()