Answer:
21
Step-by-step explanation:
average 9 pounds per three weeks
divide 9 in 3 three weeks
3 pounds per week
7 times 3 is 21
Last one
Because you have to substitute it
So you do X times 2 - 16 = 0
And the only X that works is the last one cause 8 X 2 = 16 and 16 -16=0
Answer:
can i please have more details please?
Step-by-step explanation:
3/6x+9=8
3x+9=8
3x=-1
x= -1/3