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Elden [556K]
3 years ago
7

20 POINTS !! IF YOU ANSWER THE QUESTIONS !

Mathematics
1 answer:
tatuchka [14]3 years ago
6 0
12 the answer is 12 I know it
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Choose the correct answer.
Yuri [45]

Step-by-step explanation:

Distance between Train 1 and Train 2=95 miles

Avg speed Train 1 = 45mph, avg speed Train 2=60mph

If both trains leave at the same time and travel toward each other but on parallel tracks, in how much time will their engines be opposite each other?

:

Let t = travel time (in hrs) until they are opposite each other

:

Like the hint said, when this happens the total distance traveled by both trains will be 95 mi.

:

write a distance equation from this fact: Dist = speed * time

;

Train 1 dist + train 2 dist = 95 mi

45t + 60t = 95

:

105t = 95

t = 95%2F105

t = .90476 hrs

or

.90476 * 60 = 54.3 min

:

:

Check solution by finding the total of the distances the two train travel

45(.90476) + 60(.90476) =

40.7 + 54.3 = 95 mi

6 0
3 years ago
What is equivalent to 7x(4x-5)
Ad libitum [116K]

7x(4x-5)

Distribute

28x^2-35x

Ans : 28x^2-35x

5 0
3 years ago
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PLEASE HELP I WILL MARK BRAINLEST PLEASE!!!!! 11 bounus points if u get it correct
Ratling [72]

Answer:

the answer is -1.8

Step-by-step explanation:

3 0
3 years ago
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How many permutations exist of the letters a, b, c, d taken four at a time?
inessss [21]
There are 24 permutations.

The number of permutations of 4 objects taken 4 at a time is given by
4!/(4-4)! = 4!/0! = 4!/1 = 4! = 24
3 0
3 years ago
The cost of renting a car is $75/wk plus $0.15/mi traveled during that week. An equation to represent the cost would be y = 75 +
qaws [65]
The answer to the question is 65 miles

5 0
3 years ago
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