Answer:
4
Step-by-step explanation:
If sandwiches are 6 dollars each, then chips are 3 dollars, she only bought 5 sandwiches for 6 each for 30 dollars(5*6=30).So, she has 12 dollars left to spend since she spent 42 dollars. And 4 *3=12so she only bought 4 bags of chips.
For this case we have the following function:

We can rewrite the function to identify the zeros of it.
When rewriting the function factoring we have:

Therefore, the zeros of the function are:

Thus, the graph that contains intersections on the x axis in the points mentioned, will be the graph of the function.
Answer:
See attached image.
Answer : y=<span>2,904-121x , x for month
when you replace any number in "x" you mean how many months you pay (witch mean the sums of the all (121$) ) so when you </span>Subtract this all 121$ value you will get the the value of what you <span>still owes </span>