Answer:
A
Step-by-step explanation:
Here is a site to help you...that my teacher showed me...when you search it it will show this...just click graphing calculator
desmos.com
Answer:

Step-by-step explanation:
So the question here is asking you to use the quadratic formula which is expressed as: 
A quadratic can generally be expressed as: 
So using the equation you gave: 
We can identify the following values: a=1, b=-5, c=-1
Btw the equation explicitly write "1" as the coefficient of x, but since it's not provided it's implied that it's 1.
So plugging in the known values, we get the following equation:

The last step just consists of taking the + and - solution, and since it asks for exact solutions you leave the 29 under the radical, and you don't approximate. There is no further simplification that can be done here.
1000/20 is the same as 100/2(you just removed a 0 from both of them)
10/2=5 add a 0
50
Taking a test doesn't lessen your risk of a heart attack
Well, if both Alexis and Tara mine salt for 40 hours... they'd have mine 1,000 pounds of salt. Is this what you were looking for?