Why did the donkey walk to the chicken

Three times the difference of federico’s age, and 4, increased by 7, is greater than 37. what are possible values of federico’s age?

Find the pattern and use it to list the nth term in the sequence. 6, 12, 20, 30, 42, 56, the nth term of the sequence is

What is the best way to answer questions with a x expression in the question. for example 3x + 10x=?