What is the value of the expression below?
6 + 5 (9 ÷ 3)²

Solve for x. −3/4(x+2)=6 enter your answer in the box

Sam opened a money-market account that pays 3% simple interest. he started the account with $7,000 and made no further deposits. when he closed the account, he had earned $420 in interest. how long did he keep his account open?

Me find the answers and explain the process to find the answer of the problem appreciate it : )