Answer:
Step-by-step explanation:
1)It should be (-4)
2) It should be (-6) Not (-2)
3) It should be 30x²
4) It should be xyz
5) It should be 
6) 16x²
7) 
8) 
9)
10) a² + b² +2ab
11) -9
12)x² - x + 0
Answer:
median is 90
Step-by-step explanation:
75, 88, 92, 100
(88+92)/2 = <u>90</u>
Answer:
there is no value to x in this system because you don't have a number for the variable y
Step-by-step explanation: