Write and evaluate an expression for the problem.

The scores on your first two history tests are 82 and 95. By how many points did you improve on your second test?

An expression is
.

You improved by
points on your second test.

The party planning committee has to determine the number of tables needed for an upcoming event. if a square table can fit 8 people and a round table can fit 6 people, the equation 150 = 8x + 6y represents the number of each type of table needed for 150 people.