Answer:
B) x + s = 90, x - s = 20
Step-by-step explanation:
x + s = 90 represents that both Xavier and Sara's money combined is $90.
x - s = 20 represents that Xavier has 20 more dollars than Sara.
Hope this helps
(I answered for the equation f(x)=3x^2 - 6x +13
Vertex : (1,10)
1. a= 3, b=-6, c=13
2. none
3. (0,13)
Given in the question itself ......1 would be 33 seconds .......................
