Which of these equations has only one solution? A

2a + 7 = a + 10

B

a + 6 = 6 + a

C

4a + 4 = 4a + 9

D

3x – 3 = 3(x – 1)

Marking first correct answer as brainliest!
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Acredit card advertises an annual interest rate of 23%. what is the equivalent monthly interest rate?

Isuck at math ; ^; m a student solved this problem and said the answer is 3 feet. chase had a roll of ribbon that contained 7 7/8  feet of ribbon. he cut off one piece that was 3 5/8  feet long and another piece that was 1 1/4  feet from the roll. how much ribbon was left on the roll? is the student's answer reasonable? yes, the answer is reasonable. no, the answer is not reasonable. it should be about 2 feet. no, the answer is not reasonable. it should be about 13 feet. no, the answer is not reasonable. it should be about 4 feet.

The map shows the location of the airport and a warehouse in a city. though not displayed on the map, there is also a factory 112 miles due north of the warehouse.a truck traveled from the warehouse to the airport and then to the factory. what is the total number of miles the truck traveled?