PLEASE HELP ME

What is the positive solution to the equation x² - 6x + 9 = 16?

Clarence wants to buy a new car. he finds an ad for a car that costs 27,200 dollars. suppose his local sales tax is 7%. -how much would he have to pay? -what is the cost of the car including tax? -if clarence has 29,864 saved, can he pay cash to buy the car?

What is the point of inflection for the function f(x)=2cos4x on the interval (0, pi/2)

Solve for x where 0 equation: cot^2x+2cotx+1=0