Solution
Given the question in the image, the following are the solution steps to answer the question.
STEP 1: Write the given data

STEP 2: Find the mean

mean is 87.33
STEP 3: Find the median
Answer:
51,129
Step-by-step explanation:
x+x+78=180(supplementary angles are 180)
2x+78=180
2x= 102
x= 51
x+78 = 129
Answer:
The son is 7, the father is 49.
Step-by-step explanation:
This was a guess-and-check process. I knew this answer was correct because 7*7=49, and 49+7=56.
C.-3
x=-3
3x-15/2=4x
multiply 2 on both sides
3x-15=8x
subtract 3x from both sides
-15=5x
divide 5 from both sides
-3=x