First, we should find the expression for the number of units produced by Factory B. Since Factory B produces six more than twice the units produced by Factory A, the expression looks like this: 2(x-7)+6.
Now, we can add them together and set them equal to their total output to solve the problem.
(x+7)+2(x+7)+6=177
We solve this equation to find what x equals.
x+7+2x+14+6=177
3x+21+6=177
3x+27=177
3x=177-27
3x=150
x=50
The second graph is the correct answer. This is because we are driving 60 miles per hour and we already drove for 2 hours meaning we drove 120 miles so far. However, we 210 miles left to go. 210 + 120 = 330 miles is where we started at. Graph one shows the incorrect mile distance and graph 3 shows the incorrect mile count, too. Only graph 3 shows the correct mile count.
Answer:
Megan added the equations together but she subtract 4 instead of addition of 4. The correct solution is (1,6).
Step-by-step explanation:
The given equations are
...(1)
.... (2)
Add both equations to eliminate x.
Megan make a mistake in this step. She added the equations together but she subtract 4 instead of addition of 4.
Divide both sides by 4.
Put this value in equation (1).
Divide both sides by 2.
Therefore the correct solution is (1,6).
