Write the phrase as an expression. then evaluate when x=5. the sum of a number x and 4, all divided by 3

Add or subtract polynomial : –12qr? +13rq?

An automated water dispenser fills packets with one liter of water on average, with a standard deviation of 5 milliliter. the manual says that after a year of operation the dispenser should be tested to see if it needs recalibration. a year later a number of filled packets are set aside and measured separately. it is found that the average packet now contains about 0.995 liters. does the dispenser need calibration? explain your answer.

What is the reflection image of (5,-3) across the line y = -x?