Clearly it’s a pattern you’re just adding a number by an extra number for example 48+1= 49 49+2 = 51 51+3= 54... so therefore 58,63,69,76 are the missing numbers ❤️
Step-by-step explanation: The upward change of elevator is represented by positive sign while the downward change represented by negative sign.
Given, First the elevator goes up 15 floors, change = + 15, Then it goes 9 floors down, change = -9, Then it goes 11 floors up,Change = + 11, Finally, it goes 19 floor down, Change = - 19 So, the net change = sum of total changes = 15 - 9 + 11 - 19 = -2
