PLS HELP On number 1, is it correct? On number 2, is it correct and which way doy the line go? ​

Chanelle deposits $7,500 into the bank. she does not withdraw or deposit money for 6 years. she earns 6% interest during that time. what will the balance be when she is finally able to withdraw her money?

Nine more than four times a number is the same as one less than twice the number. find the number?

What is the least common multiple for 6 and 8? what is the least common multiple for 4 and 12 ? what is the least common multiple for 11 and 12? what is the least common multiple for 3 and 6?