Which expression is equivalent to sin(2x) − sinx?

Which is equivalent to 10/12? options: 10/18 5/6 3/12 9/11

If there is 20 dogs in the shelter and 5 dogs get homes, and then 43 more dogs come. how many dogs are there in the shelter?

The expression 1.01*1.005(^t) gives the amount of money, in thousands of dollars, in carter's savings account (t) years after he opens it. what does 1.01 represent in this expression?