Answer:
The answer is x=20
Step-by-step explanation:
27-7=20
x=20
1/2 fraction of whole carton was used for each serving
Answer:
x^4 - 81 = 0
(x² - 9)(x² + 9) = 0
Notice that the first of these is itself a difference of two squares:
(x - 3)(x + 3)(x² + 9) = 0
So the solutions are x = 3, x = -3, x = 3i, x = -3i
170
Because you have to add
120 + 50 = 170
