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alexandr1967 [171]
3 years ago
13

Ted can mow the lawn in 5 minutes by using his power mower. Galen takes 15 minutes to mow the same lawn using a push-type mower.

How many minutes would the job take if the two boys worked together? If t is the time working together, which of the following expressions represents the portion of the job that Ted will complete when the guys work together?
Mathematics
2 answers:
Nikitich [7]3 years ago
7 0

Answer:

t/5

Step-by-step explanation:

i just answered the question and got it right.

EastWind [94]3 years ago
6 0
    We need to calculate a TIME.  Here, TIME = job / rate

Here, 

             1 JOB                                      1                 1
------------------------------------- = ------------------ = ---------------
   JOB/5 min + JOB/15 min           1/5 + 1/15     3/15+1/15
           1
= ------------ minutes = 15/4 minutes = 3 3/4 minutes (answer)
          4/15
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Becca and Kimberly are running at a constant speed in a marathon. Becca runs at 4.5 miles per hour. Kimberly’s progress is shown
Georgia [21]

Answer:

Part A: Kimberly

Part B:

Becca = 22.5 miles, Kimberly = 25 miles

Step-by-step explanation:

Part A:

Given that Becca runs at a constant speed of 4.5 miles per hour, use the table to find the constant speed that Kimberly runs, and compare who runs faster.

Let x = time

y = distance

k = speed = y/x

Equation for each person can be written as: y = kx

Therefore:

✔️Equation for Becca if k = 4.5

y = 4.5x

✔️Find k (speed) of Kimberly using (2, 10):

Speed (k) = y/x

k = 10/2

k = 5 miles per hour

Equation for Kimberly would be:

y = 5x

Comparing their speed, Kimberly runs faster because she covers more miles per hour than Becca does.

Part B:

For Becca, substitute x = 5 into Becca's equation, y = 4.5x

Thus:

y = 4.5*5 = 22.5 miles

For Kimberly, substitute x = 5 into Kimberly's equation, y = 5x

Thus:

y = 5*5 = 25 miles

5 0
3 years ago
Find the GCF.<br><br> 18c3 and 24c3
12345 [234]

Answer:

6c³

Step-by-step explanation:

18c³ = 2 × 3 × 3 × c × c × c

24c³ = 2 × 2 × 2 × 3 × c × c × c

Now we show the common factors in bold:

18c³ = 2 × 3 × 3 × c × c × c

24c³ = 2 × 2 × 2 × 3 × c × c × c

The common factor are:

2, 3, c, c, c

GCF = 2 × 3 × c × c × c = 6c³

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Answer:

-5

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Step-by-step explanation:

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1/10 currant
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Step-by-step explanation:

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