The sum of two numbers is 42 and the difference is 14 . what are the numbers?

Which statement describes surface features called maria on the moon

Is this a polynomial function? i need to know asap

Gabriel determined that his total cost would be represented by 2.5x + 2y – 2. his sister states that the expression should be x + x + 0.5x + y + y – 2. who is correct? explain.