Answer:
i think it's 30°. because 8/17=0.5=SIN30°
(7a+3)+(-a-5)=-16
Combine like terms:6a-2=-16
Add 2 to both sides: 6a=-14
Divide both sides by 6: a=-14/6
Simplify: a=-7/3
The road trip is 2916 miles long, if she wants to complete the trip in 6 days she will need to drive ___ miles per-day.
To figure this out we will need to divide 2,916 by 6 days
2,916/6 = 486 miles
[If you can't type fractions, then instead of 24/8, do 3]
The first missing value is 3 or 
= 
The second missing value is 24 (because 3 times 8 is 24)
= 
Make the denominators the same in order to add them together
= 
The third missing value is 29
Pick any two points and find the rise over run (y over x) this is how you get your slope as for the y-intercept look at the point where the line crosses the y-axis
