Answer:
x=3, -1/7
Step-by-step explanation:
7x^2-20x-3=0
Factor.
(x-3)(7x+1)=0
x-3=0 ⇒ x=3
7x+1=0 ⇒7x=-1 ⇒x= -1/7
Answer: 80%
Step-by-step explanation:
40/50 = 80/100 = .8 then move decimal over 2 places to the right for percent. .8 to 8.0 to 80.0
I think it's B. not sure though u should wait. till someone else answer to see if I am right
Answer: 
Step-by-step explanation:
The solution to the graph of a system of equations is where they intercept. Here, it is at about .
Answer:
No, zack will finish first.
Step-by-step explanation:
I would rather not write it out but zack should finish first
