|x – 55| = 4.2
where x is the speed.
-4.2 < x - 55 < 4.2
-4.5 + 55 < x < 55 -4.2
50.8 < x < 59.2
The upper boundary for x is 59.2
The speed must be in the range 55 - 4.2 to 55 + 4.2.
5x - 9x = - 4x
14 - 50 = -36
- 36 = - 4x
- 36/- 4 = x
x = 9
Answer
A.) 7* 10/9
When you divide fraction you change the symbol and flip the fraction and A is that equation.
She will drink 2912 glasses of water because 52*56=2912.
The answer has to be letter A .
