36.64-21=15.64
15.64-6.14=9.5
The answer is she made $9.50 worth in local calls last month
First one is 7.73 (23.19/3)
Second one is 14.04 ((19.71/7.3) x 5.2)
40 hours at 5.90 a hour so 40 hours he would make 236
The total number of gallons of paint needed for the big room is 3x and the number of gallons of paint needed for the small room is 2y.
3x + 2y = 16
Given the sizes of the room, the relation should be that,
x = 2y
Solving the equation,
3(2y) + 2y = 16
y = 2
Therefore x is equal to 4 gallons.
With the condition that only the bigger room is painted, the number of gallons of paint used should be 12 gallons and what is left should be 4 gallons.
16 = 4²
So, by the definition of logarithms
