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RoseWind [281]
3 years ago
7

Is 5y + 27 factorable or primeexplain​

Mathematics
2 answers:
Fofino [41]3 years ago
6 0

Answer:

Prime

Step-by-step explanation:

  • As there is no common between 5y and 7 except 1 as factor.
  • Hence its not factorable
Andre45 [30]3 years ago
3 0
Prime because it cannot be a factorable
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A robot moving forward at a constant speed takes 2.5 hours to travel 1 kilometer. Moving forward at this same constant speed, it
makvit [3.9K]

Answer:

The length of the hallway is 10 m.

Step-by-step explanation:

Given:

Time taken to cover 1 km = 2.5 hours

Distance covered in 2.5 hours = 1 km

Therefore, speed of robot = \frac{\textrm{Distance}}{\textrm{TIme}}=\frac{1}{2.5}=0.4\ km/h

Now, speed is constant.

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Converting 0.4 km/h to m/s, we multiply by the factor \frac{5}{18}. This gives,

0.4\times \frac{5}{18}=\frac{1}{9}\ m/s

Now, distance of the hallway is equal to the product of speed and time. So,

Distance of hallway = Speed \times Time

Distance of hallway = \frac{1}{9}\times 90=\frac{90}{9}=10\ m

Therefore, the length of the hallway is 10 m.

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3 years ago
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Lena [83]
The third one because eighteen does not have factor that can be added or subtracted to make 3 ;)
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