Answer:
77 C
Step-by-step explanation:
To find the mean add all the numbers together then divide by the total amount of numbers
Answer:

Step-by-step explanation:
4 x 10^7 is 40000000
4 x 10^3 is 4000
We are told that 4x10^7 is something times as much as 4x10^3
So we will work backwards to find the answer,
If you divide 40000000 by 4000 you will get 10000
10000 is the same as 10^4
X= -12.5 you add (4+3) then, you combine it with 18 to get 25, then you divide 25 by -2x
Answer:
17c + 9 = 10c + 9 - 7c
COMBINE LIKE TERMS
10c + 7c = 17c
9 IS NOT A LIKE TERM, SO WE LEAVE IT ALONE