Answer:
x=4
Step-by-step explanation:
x^3-4x^2-16x+64
(x^2-16)(x-4)
x-4=0
+4 +4
x^2-16=0
+16 +16
x^2=16
√ x^2=√ 16
For every 6 dumplings bought, you get charged $3.00 plus 7 cents for every dollar. Hope this helps:)
