De los 125 alumnos que hay en 5 grado, 3/4 de ellos tienen celular. Cuántos alumnos no tienen celular?
1 answer:
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Answer:
Step-by-step explanation:
We can rewrite the left hand side as a perfect square, more specifically
So, taking the square root of both sides,
Answer:
3.6 hours
Step-by-step explanation:
Blake can do work in hours = 9
Blake can do a part of work in 1 hour =
Ned can paint the same room in six hours.
Ned can do a part of work in 1 hour =
They can do a part of work together in 1 hour =
=
Now they can do part of work in hour = 1
So, they can do whole work in hours =
=
Hence it will take 3.6 hours to paint the room if they work together.