Answer:
X=5
X=2
Step-by-step explanation:
I think the answer would be 1.8
Answer:
1.46
Step-by-step explanation:
First find the the mean score before he made a 90.

Now add the score of 90 and calculate.

Subtract the two scores.

His mean test score increased by 1.46.
Answer:
The correct answer is A
Step-by-step explanation:
plz brainlyest (: