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Dmitrij [34]
3 years ago
8

The timekeeper for a particular mile race uses a stopwatch to determine the finishing times of the racers. He then calculates th

at the mean time for the first three finishers was 5.75 minutes. After checking his stopwatch, he notices to his horror that the stopwatch begins timing at 45 seconds rather than at 0, resulting in scores each of which is 45 seconds too long. What is the correct mean time for the first three finishers?
Mathematics
1 answer:
insens350 [35]3 years ago
7 0

Answer:

300 seconds = 5 minutes

Step-by-step explanation:

At first convert the time in minutes which is

5.75 * 60 = 345 seconds

No as the average is 345 seconds at starts from 45 so we subtract that time from 45 seconds

345-45 = 300 seconds (Mean)

So 300 seconds = 300/60 = 5 minutes

So the Accurate mean is 5 minutes

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The Elliot’s have budgeted $2000 to install new wood floors in their home. The materials cost them $1055. If the installer charg
Anna35 [415]

Answer:

27 hours

Step-by-step explanation:

2,000-1,055=945

945/35=27

27 hours is the most the installer can work before going over Elliot's budget hope this helps :D


4 0
3 years ago
Read 2 more answers
A car and truck are 540 miles apart. The two vehicles start driving toward Each other at the same time. The car drives at a spee
mina [271]

Answer:they would meet after 4.5 hours

Step-by-step explanation:

At the point where they will both meet, they would have covered a total distance of 540 miles.

Let t represent the time it will take the car and the truck to meet.

Distance = speed × time

The car drives at a speed of 65 miles per hour. Distance covered by the car in t hours would be

65 × t = 65t

The truck travels at a speed of 55 miles per hour.

Distance covered by the truck in t hours would be

55 × t = 55t

Therefore,. 65t + 55t = 540

120t = 540

t = 540/120 = 4.5 hours

3 0
3 years ago
What is the slope of the line that contains the points (-2, 7) and (2, 3)?
stealth61 [152]

Answer:

-1

Step-by-step explanation:

We can use the slope formula when given two points

m= ( y2-y1)/(x2-x1)

   = ( 3-7)/(2 - -2)

   = (3-7)/( 2+2)

   = -4/4

    = -1

6 0
3 years ago
exercise 5 explain how you know the values of the digits in the number 58?then exercise 6 `explain why you should record a 1 in
melamori03 [73]
58 is 50 plus 8. So its 50 and 8.That is for the first one.
3 0
3 years ago
Can any one please help me with these Math questions soon as possible?
disa [49]

Answer:

the answer to the first question is 9/27, 5/27, 13/27

the answer to the second question is 27/126, 33/126, 20/126, 42/126

the answer to the last question is 32/44

Step-by-step explanation:

they way you solve the fist two questions you just add the numbers up and that will tell you your probability.

for the last question you take the number of players and subtract it by 12 to get the top number

7 0
3 years ago
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