If y varies directly as x, and y = 25 as x = 5, find y for the x-value 7.

Mathematics

1 answer:

Andrej [43]3 years ago

7 0

Y would equal 35 I believe.

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Answer: There are five sides in a polygon.

Step-by-step explanation:

Since we have given that

Measure of exterior angles = 72°

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As we know the formula for "Number of sides of polygon".

Number of sides is given by

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A plane traveled 240 miles. The trip was with the wind. It took 3 hours. The trip back was into the wind. The trip back took 6 h

sveta [45]

Answer:

Plane speed is 60 miles/hour

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Step-by-step explanation:

Lets suppose the speed of the plane in still air is s and speed of the wind is w and since speed in the formula below equals speed of the plane plus the wind's speed so speed=s+w for this journey with the wind

$Speed=\frac{Distance}{Time}$

$Distance=Speed*Time$

For the first journey the trip with the wind:

$Distance=Speed*Time\\240=(s+w)(3)\\240/3=s+w\\s+w=80$

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$Distance=Speed*Time\\240=(s-w)*6\\240/6=s-w\\s-w=40$