Answer:

Step-by-step explanation:
Let
x------> amount of money that Samantha spends weekly on her school lunch
we know that
The inequality that represent this situation is

All positive real number less than or equal to 15
Answer: y=x
The slope of the perpendicular line is the opposite reciprocal. So you do -(-1/1) which equals 1. So now we have y=x+b. Plug (3,3) into this and you get 3=3+b. So b=0 and the equation is y=x
Answer:
Carolyn's mistake was confusing the selling price of the necklaces with the profit.
Step-by-step explanation:
Let
x-------> the selling price of each necklace
we know that
The linear equation that represent the situation is equal to

solve for x


The profit on each necklace is equal to

therefore
Carolyn's mistake was confusing the selling price of the necklaces with the profit.