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Tresset [83]
3 years ago
6

Two cars leave town at the same time going in opposite directions. One travels at 70 mi/h and the other at 55 mi/h. In how many

hours will they be 250 miles apart?
Mathematics
2 answers:
LUCKY_DIMON [66]3 years ago
6 0
I think its 17 hours



Murljashka [212]3 years ago
6 0
Use this correlation distance-time-speed to find the answer
d = vt
d stands for distance, v stands for speed/velocity, t stands for time

The sum of the distance must be 250 miles, so they could be 250 miles apart.
The time must be the same for the two cars.
distance 1 + distance 2 = 250
v₁t + v₂t = 250
70t + 55t = 250
125t = 250
t = 250/125
t = 2

They will be 250 miles apart in 2 hours
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jok3333 [9.3K]
So first we find the change
45 to 15=45-15=30

change is 30
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original=45
change=30
30/45=10/15=2/3=0.66666666=66%
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3 years ago
In 4 games, Larry averaged 23 PPG (points per game). How many points does he need to score in the last game to have an average o
ivann1987 [24]
Larry needs to score 33 points in the last game to have an average of 25 PPG.

To find the answer, we can solve the equation:

\frac{(4)23+p}{5}=25

<em />(where <em>p</em> is how many points he needs to score in the last game)

To find the mean of a group of numbers, you add them all up and divide the total by the number of numbers there are. Since Larry averaged 23 PPG in 4 games, we can multiply 23 by 4 to get the total of the first 4 games from the data. Then, we find <em>p</em>, which we will add to get our final total. Then, you divide by the 5 games.

\frac{(4)23+p}{5}=25
\frac{92+p}{5}=25
{92+p}=125
p=33

First, I simplified 4 x 23 to get 92. Then, I multiplied each side by 5 to get rid of the denominator. Finally, I subtracted 92 from each side to isolate <em>p</em>, and found that <em>p</em> = 33.


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