Please help me I don't under stand this question

Hannah is 3 years older than twice her brother joey’s age. joey is 2 years old. how old is hannah? show all of your work! the number of students is five more than seven times the number of teachers. there are 10 teachers. how many students are there? be sure to show all of your work!

The product of sin 30 degrees and sin 60 degrees is same as the product of

The graph represents f(x)=[x]+3. what is f(-2.2)?