The first question is non-linear because it is an exponential equation, which is a curved line on a graph.
The second question is linear because you gain 5 every week, which is a straight line.
Unsecured, but this is in the wrong section.
If the angles are vertical, they must be equal.
If the angles are supplementary, then they add up to 180 degrees.
If each angles is x (since they are equal)
then
2x=180, or
x=90 °
The angles are each 90 °
If you spend $4.25 for lunch every school day for a week and on Saturday you spend $5.75 you spend $27 in all.