20 is the answer because it is the only number that has positive and it says sum
Answer:
13.9
Step-by-step explanation:
To find the mean, add the two numbers and divide by two.
(13.9+13.9)/2=13.9
3 (2x + 1) = 21
6x + 3= 21
-3 -3
6x = 18
Divide each side by 6, and x equals 3.
3 (2(3) + 1) = 21
3 (6 + 1) = 21
18 + 3 = 21
Hope this helps! Can I please have brainliest so I can level up? Thank you!
#1
n^32 (2nd choice)
#2
1/x^15 (1st choice)
#3
c^15 (2nd choice)
#4
x^10 / m^3 (last choice)
#5
x^12y^8 (1st choice)
#6
1 / 8y^12 (3rd choice)
#7
r^10 s^5 (last choice)
#8
x^4 / y^6 (last choice)
#9
(b^2)^4 = b^8
answer is 4 (2nd choice)
