Answer:
48. Correct
49. Los Altos = 48
Westmoreland = -48
48 - ( -48)
48 + 48
96
The difference in elevation is 96 meters
50. Imperial = -18
Holtville = -3
(-18) ÷ (-3)
6
Imperial is 6 times as far below sea level than Holtville
If I understand this, you have the equation 6(2x+7)-5. This is equal to 12x+37. Hope this helps.