Answer:
6 hours
Step-by-step explanation:
We know that he can dig 7 holes every two hours. 21 divided by 7 is 3, and 3 x 2 hours equals 6.
Pumping gasoline into your car. The quantity of gasoline and the price you pay have a proportional linear relationship.
Eloise made these steps well:
Square root of negative 2x plus 1 - 3 = x
Square root of negative 2x plus 1 - 3 + 3 = x + 3
The error comes in the next step:
Square root of negative 2x plus 1 = x + 3
Square root of negative 2x plus 1 -1 = x + 3 - 1
Square root of negative 2x = x + 2
the number one is inside the root, therefore they can not be subtracted.
answer
error in the step:
Square root of negative 2x = x + 2
It would end up being .63¢
