Answer:
a
Step-by-step explanation:
Answer:
3+4x
7-12
2x+14=18
four times a number
four times a number is added to seven
Step-by-step explanation:
The sixth number should be 16 in order for the mean to be 12
Answer:
b
Step-by-step explanation:
Answer:
-3a
Step-by-step explanation:
3(-a)
Expand brackets.
3 × -1a
-3a