May I please get help in 7th grade math?

Simplify 15(x - 4)(x -1)-3(x + 4)(x - 1) with steps

At the beginning of year 1, carlos invests $600 at an annual compound interest rate of 4%. he makes no deposits to or withdrawals from the account. which explicit formula can be used to find the account's balance at the beginning of year 5? what is, the balance?

Given: ab ≅ bc and ao ≅ oc ok − angle bisector of ∠boc find: m∠aok