The daily mean temperature: A) is the average of 24 temperatures taken an hour apart.
B) is the difference between the day's high and low temperature.
C) is the average of the maximum and minimum temperature for a given day.
D) varies little from month to month.

To solve this system of equations by elimination, what operation could be used to eliminate the y-variable and find the value of x? 6x + 5y = 2 4x + 2y = 8 a) subtract 2 times the second equation from 3 times the first equation b) subtract 3 times the second equation from 2 times the first equation c) subtract 5 times the second equation from 2 times the first equation d) subtract 2 times the second equation from 5 times the first equation