I need part A and B now please
Thank you!!

Step-by-step explanation:

We can create a function based on this scenario.

We know that you start with $70. This would be a constant. So, we already know that our function will contain +70.

If we earn $50 a week, we know that we can create an expression here to find how much we make based on how many weeks we spend, assuming t represents the amount of weeks we spent.

We can add this to our original constant of 70.

Since the output will be a function based on how many weeks we spend, we can make it equal to s(t).

The slope here is 50, meaning that every week we earn 50 dollars more.

This means the amount of money changes by 50$ per week.

Hope this helped!

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.

step-by-step explanation:

yes it represnts a functio, their are not 2 of the same numbers on the both sides