Part 1: Write the expression 1/3 (9x + 15x - 7 -3x + 22) as the sum of 2 terms. Part 2: First, rewrite the expression by combining like terms.

1/3 (9x + 15x - 7 -3x + 22) = 1/3( x + )

Need help ASAP!

In triangle abc, the length of side ab is 12 cm, the length of side bc is 5 cm, and the length of side ca is 9 cm. find the measure of angle a using the law of cosines.

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.

100 points, hi, i’m not sure how to get the equation from the graph and table.