13k + 6 + 2y + 9 + k
Please answer

It says factor each expression 49x-28?

Which of the following would be a good name for the function that takes the weight of a box and returns the energy needed to lift it?

Type the correct answer in the box. consider the system of linear equations below. rewrite one of the two equations above in the form ax + by = c, where a, b, and c are constants, so that the sum of the new equation and the unchanged equation from the original system results in an equation in one variable.