Answer:
7.8
Step-by-step explanation:
Since the average is 7.8 and everyone scored the same score so
that means everyone scored a 7.8
I just got this off photo math they want me to type so I’m just finna say stuff but the answer is right there
3+6x+3x+ 6 = 180
9x + 9 = 180
9x = 171
x = 19
84 pounds on earth is about 14 pounds on the moon but to be exact it is 13.89 pounds.