A music store buys instruments and then sells them for 30 % more than they paid
1 answer:
You might be interested in
Answer:
91
Step-by-step explanation:
Mean is calculated as
mean =
let x be his test score of his last test , then
= 85 ( multiply both sides by 7 )
504 + x = 595 ( subtract 504 from both sides )
x = 91