Divide £90 in a ratio 5:4

Me solve this problem, and someone clearly explain to me how to solve it.1.) use the value of the discriminant to determine if the given trinomials has 2 real solutions, 1 real solution, or no real solutions. a.  x2  − 4x  − 7 = 0b. 4r2  + 11r  − 3 = 0c. 3m2  + 7 = 0d.  t2  + 2t  + 1 = 0

Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15

You wanted to draw an enlargement of design that printed on a card that is 4 in by 5