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Westkost [7]
1 year ago
6

Two groups went hiking, leaving at the same time and arriving back at the same time. While one group moved away at the speed 6 m

ph and then moved back at the speed 4 mph, the other group moved all the way with the same speed. What was the speed of this second group, if both groups covered the same total distance, 24 miles?
Mathematics
1 answer:
Evgesh-ka [11]1 year ago
5 0

Step-by-step explanation:

d = the distance in one direction.

the time t1 it took group 1 was

t1 = d/6 + d/4

and t2 for group 2 moving with speed2 all the way

t2 = (d+d)/speed2

we know

2d = 24 miles

d = 12 miles

t1 = t2

so,

12/6 + 12/4 = 24/speed2

2 + 3 = 24/speed2

5 = 24/ speed2

5×speed2 = 24

speed2 = 24/5 = 4.8 mph

the second group moved with 4.8 mph.

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8 0
3 years ago
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Answer:

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Step-by-step explanation:

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How many solutions does the following equation have 3(X + 9) = 2x + 54
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Answer:

One solution.

Step-by-step explanation:

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8 0
3 years ago
A student has received the following test scores: 71%, 89%, 72%,
lidiya [134]

Answer: 81%

Step-by-step explanation:

From the question, we are informed that a student received the following test scores: 71%, 89%, 72%,

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First, to make it easy we can remove the percent sign. Then we multiply 80 by 6 since we're calculating for 6 tests scores. This will be:

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We then add all the 5 test scores. This will be:

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We then subtract the values gotten. This will be:

= 480 - 399

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3 years ago
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