All you have to do is find the LCD of the number of hours Mark and Frank uses to paint a room.
Mark - 3
Frank - 4
So list the numbers that are a result of a number and 3 and 4
(example: 4 x 1 = 4, 3 x 3 = 9)
3 - 3, 6, 9, 12, 15
4 - 4, 8, 12, 16
The list goes on and on but what we need to get is the LCD so it means it's the least number that 3 and 4 have in common.
3 and 4 both have 12 so The LCD of 3 and 4 is 12.
Another way of finding the LCD could be multiplying the numbers together, but it's not always gonna be the least number. Remember that LCD stands for Least Common Denominator.
How many hours would it take Mark and Frank to paint the room together at their respective rates?
The answer is - 12 hours
Answer: Jason can substitute 
into the equation. The left side of the equation must be equal to the right side of the equation.
Step-by-step explanation:
The equation 
must be solved by calculating the value of the variable x:
Add like terms:
Divide both sides by -12:
Once Jason solves for x, he has to substitute into the equation and simplify to check his answers.
If his answer is right, the left side of the equation will be equal to the right side of the equation.
Then:
is a solution of the equation.
Your percentage of change would have to be about 21.05, but the full answer is 21.05263. Since we are going to need to round to the nearest percent, you would have 22% decrease. The difference in the change is -20.
The answer is 18 .
All you have to do is swich the numbers
Answer:
Step-by-step explanation:
