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3 years ago

3y-5=5y What is the value of y?

Mathematics

2 answers:

navik [9.2K]3 years ago

8 0

The value of Y would be -5 = 2y

dybincka [34]3 years ago

6 0

Answer:

Y=-2.5

Step-by-step explanation:

In order to solve this we need to isolate the variable

First we have to subtract five Y from both sides.

-2y-5=0

Then we have to add five to both sides

-2y=5

then divide by -2 to find the value of y alone

y=-2.5

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Step by step - Replace f (x) with y.

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A figure is made up of a triangle and a rectangle. The triangle has a height of 8.5 inches and a base of 10 inches. The rectangl

Brilliant_brown [7]

$\sf are a \ of \ triangle : \frac{1}{2}*base *height$

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2 years ago

A raft and a motorboat simultaneously leave from the same point and move down the river. After 2 hours the motorboat turns aroun

lesya692 [45]

Answer:

2 hours

Step-by-step explanation:

Let x mph be the speed of motorboat in still water and y mph be the speed of current.

A raft and a motorboat simultaneously leave from the same point and move down the river, then speeds down the river are:

motorboat = x + y mph

raft = y mph

In two hours they will cover:

motorboat = 2(x+y) miles

raft = 2y miles

After 2 hours the motorboat turns around and starts moving towards the raft (against the current), so its speed is now x - y mph.

Let t be the time they move towards each other. In t hours, they cover

motorboat = t(x - y) miles

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The distance from the starting point to the turning point is the same as the sum of the distances the raft covers and the motorboat covers after turning around, so

$2(x+y)=2y+t(x-y)+ty \\ \\2x+2y=2y+tx-ty+ty\\ \\2x=tx\\ \\t=2\ hours$

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3 years ago