(6g - 9) + 1/3(15 - 9g)

The chart below shows the distribution of weeds in yard

Suppose you are choosing a 6-digit personal access code. this code is made up of 4 digits chosen from 1 to 9, followed by 2 letters chosen from a to z. any of these digits or letters can be repeated. find the total number of personal access codes that can be formed. 492,804 341,172 39,917,124 4,435,236

8litres of paint can cover 129.6 m². how much paint is required to paint an area of 243m²?