Can you please help me out guys It's factorisation

( 1 ) 6x² + 17x + 12

( 2 ) 12x² - 56x + 9

( 3 ) 18x² - 9x - 20

Amerchant has coffee worth $60 a pound that she wishes to mix with 50 pounds of coffee worth $90 a pound to get a mixture that she will sell for $70 a pound. how many pounds of the & 60 coffee should be used?

What are the solutions of the system? solve by graphing. y = -x^2 - 3x + 2 y = -2x + 2

How do you write 600 as a product of its prime factors (index! )