What is the domain of the function in this table?

Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15

In a certain city, the hourly wage of workers on temporary employment contracts is normally distributed. the mean is $15 and the standard deviation is $3. what percentage of temporary workers earn less than $12 per hour? a. 6% b. 16% c. 26% d. 36%

Which equation can be used to measure the density of water in a spherical water tank? let w represent the number of water particles within the region.