I have a very hard two questions if I get it right it brings up my grades. Please help me it's timed.

The pressure exerted on the walls of a container by a gas enclosed within it is directly proportional to the temperature of the gas. if the pressure is 6 pounds per square inch when the temperature is find the pressure exerted when the temperature of the gas is 380 degrees f show work for the

Aquadratic equation in standard from is written ax^2= bx+c, where a,b and c are real numbers and a is not zero?

3x + 4y = 5 x- 3y = -7 solve by substitution