The answer is 80 because you add then subtract
Here's what you have to do: multiply. 54.9×12= 658.8. So, he traveled 658.8 miles in twelve hours.
Answer:
The original number was 54.5.
Step-by-step explanation:
If a number is increased by 2.8%, then it is 102.8% of it's original number.
In mathematics, "of" in virtually all cases means "multiplied by".
Therefore, we do the opposite:
1. Convert to a decimal.
102.8% = 1.028
2. Divide by the decimal.

3. Round it to the nearest tenth.
54.47 rounds to 54.5.
Answer:
Zero
Step-by-step explanation:
there is no solution the sides are uneven. if you solve for it 3x and 3x cancels out each other leaving you with -2=5
3(x+5)=7-x3x+15=7-x4x=-8x=-2