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15 July, 11:37

Which does NOT represent a constant rate of change of 70 miles per hour for a car? Question 4 options: d = 70t, where d represents distance in kilometers and t represents time in hours. The car travels 140 miles in 2 hours. The car travels 245 miles in 3.5 hours. d = 70t, where d represents distance in miles and t represents ti

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  1. 15 July, 11:42
    0
    A

    Step-by-step explanation:

    Lets start with the las option: d=70t. If the car dirves at 70 mph, in 1 hr (t=1) it must have gone trough 70 miles (d=70). Lets replace d and t in the equation:

    d=70t

    70 = 70 (1) = 70

    So, as it fits, the option is ok! So D is not the wrong one.

    Now lets see option 3:

    If the car rides 245 miles in 3.5 hours, we need to see the average miles done in 1 hour. We do this by dividing distance by time:

    245 m/3.5 h = 70 mph

    So, as it verifies our speed this question is not wrong.

    The same happens with option 2 if we divide 140m/2h = 70mph and option 2 is not wrong.

    What happens with option 1: d = 70t?

    But the first option is equal to the last one, d = 70t which we saw is ok.

    So, here you may have a mistake on the statement.
  2. 15 July, 11:49
    0
    Step-by-step explanation:

    Train B is faster because if u multiply 70*2 is 140 70*4 is 280 70*5 is 350 so train B
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