What number does E represent

3x + 4y = 5 x- 3y = -7 solve by substitution

The owner of the plant nursery where you were tells you to fill 350 ml bottles from a 30 l from a fertilizer

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%