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iris [78.8K]
2 years ago
11

4x/5 - 3x/7 = 4x/7 + 5x/7 can anyone please help with explanation...​

Mathematics
1 answer:
kirill115 [55]2 years ago
7 0

Answer: x=0

Step-by-step explanation:

Multiply both sides of the equation by 35, the least common multiple of 5,7.

7×4x−5×3x=5×4x+5×5x

Multiply 7 and 4 to get 28.

28x−5×3x=5×4x+5×5x

Multiply −5 and 3 to get −15.

28x−15x=5×4x+5×5x

Combine 28x and −15x to get 13x.

13x=20x+25x

Combine 20x and 25x to get 45x.

13x=45x

Subtract 45x from both sides

13x−45x=0

Combine 13x and −45x to get −32x

−32x=0

Product of two numbers is equal to 0 if at least one of them is 0. Since −32 is not equal to 0, x must be equal to 0.

X=0

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Step-by-step explanation:

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And apply it to get the horizontal and vertical displacements.

Once we have found them, we can use trigonometric functions to find the projection angle with respect the horizontal.

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Using the definition of displacement, we can write the horizontal displacement as

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In the same manner we can look at the y components of those points to find the vertical displacement

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Thus the horizontal displacement is 11 units and the vertical displacement is 9 units.

Projection angle.

The projection angle with respect the horizontal is the angle that is made between the line that connects the points P1 and P2 and the horizontal, so we can use the linear displacements previously found to write

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\theta = \tan^{-1}\left(\cfrac{\Delta y}{\Delta x}\right)

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