Sam is making brownies. The recipe calls for 12 fl. oz. of vegetable oil per batch. If Sam makes 4 batches of brownies, how many cups of vegetable oil will he use? (8 fl. oz. = 1 cup)

I believe that Sam would need 6 cups of vegetable oil.

Step-by-step explanation:

Altogether in her 4 batches she would need 48 fl. oz. Since you put that 8 fl. oz. = 1 cup, we know that 1 cup of vegetable oil will be equivalent to 8 fl. oz of oil. Thus, we do 48÷8, which equals to 6.

16x^2+9

Step-by-step explanation:

Use the FOIL method

(3x3)=9

(3)(-4x)=(-12x)

(4x)(3)=12x

(4x)(-4x)=(-16x^2)

-16x^2-12x+12x+9

Combine like terms

-16x^2+9