Answer:
Step-by-step explanation:
The error is in the second step. For some unknown reason, the x was dropped and the 3 was subtracted from the 7.
It should be
9x +3x + 12 = 7
12x + 12 = 7 Subtract 12 from both sides.
12x + 12 - 12 = 7 - 12 Combine
12x = -5 Divide by 12
12x/12 = -5/12
x = -5/12 or x = - 0.4167
B is correct
6(3+2)
3+2= 5
5x6= 30
18+12= 30
30=30
<span>The constant rate of change is 30 seconds because:
1 mile=30 seconds
2 miles=1 minute
3 miles=1 minute and 30 seconds
4 miles=2 minutes
5 miles=2 minutes and 30 seconds
or in other words 2.5</span>
Answer:
The answer is -14/25 or - 0.56
