Answer:
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The number of cars that have passed through the intersection after 7 wrecks is 1/5 cars
<h3>Direct variation</h3><h3 />
- Number of wrecks = w
- Number of cars = c
w = k × c
31 = k × 1,085
31 = 1,085k
k = 1085/31
k = 35
If w = 7
w = k × c
7 = 35 × c
7 = 35c
c = 7/35
c = 1/5 car
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For this case we have:
Diana:
mile in 5 minutes.
To find the speed we divide the distance by the time:
Thus, Diana's speed is
Fernando:
mile in
Thus, Fernando's speed is
We find the speed in miles per hour considering that an hour has 60 minutes.
Diana:
Fernando:
Answer:
Diana's speed is
Fernando's speed is
So we multiply both sides by 7 to make 2/7 a whole number. You get 2(4q+7/2)-21q=63. Then take 4q+7/2 out of parentheses and you get 8q+7-21q=63. Subtract 7 on both sides and add the q’s together, -13q=56. Divide both sides by -13 and you get around 4.3
J. 5a + 8 I think
I just added everything together