14 because Mark has none, Cat has 8 and Sophia has 6 so 8+6=14.
Just set them equal to each other
2x-2= x+3
2x-5=x
-5= -x
X=5
Hope it helps
- Discriminant Formula: b² - 4ac, with a = x^2 coefficient, b = x coefficient, and c = constant
So firstly, using our equation plug in the values into the discriminant formula and solve as such:
(-7)² - 4 × 3 × 4
49 - 48
1
So our discriminant is 1. <u>Since 1 is positive and a perfect square, this means that there are 2 real, rational solutions.</u>
