Supplementary angles are two angles whose sum equal to 180 degrees. Vertical lines are the opposite angles in the intersecting lines. Thus, each of your angles must be 90 degrees. Just simply draw two straight and intersecting lines.
Its the first one. Beacuse she gains speed then slows down and stops but then starts up again then slows down. Hope this helps!
Answer:

Step-by-step explanation:

Let's solve the second equation for a to later on replace it in the first equation.

Now plug this into the first equation.

Distribute the 9

Break down the fraction.

Simplify.

Subtract 

Combine like terms.



Muliply by the reciprocal or inverted fraction next to b.


Now plug this value into any of the equations to find the value of a.

Answer:
B. The number of years between adjustments in the interest rate
Step-by-step explanation:
The "5" in "5/1" means there will not be any adjustment in interest rate for the first 5 years.
The "1" in "5/1" means interest rates may be adjusted at 1-year intervals after the initial 5-year period.