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2 Cups of peanut butter chip

Step-by-step explanation:

If she used 4 cups in her first batch with the 2:2 ratio then she would need to split in half because of the new 3:1 ratio.

2 cups of peanut butter chips

Step-by-step explanation:

Hope this helps!!

or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!

c.

step-by-step explanation:

substitution for (0,1)

y=x^2+4x+1

1=0^2+4(x)0+1

1=0+4(x)0+1

1=4(x)0+1

1=0+1

1=1

substitution for (-3,-2)

y=x+1

-2=-3+1

-2=-2