Consider the equation 4x -5(2x +1) = ax + b If a= (-6) and b=0 how many solutions does this eqaution have

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?

Ineed in figuring out this problem.

Which of the following is the shape of a cross section of the figure shown below