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Mice21 [21]
4 years ago
10

Help! For each function, determine whether y varies directly with x.if so, identify the constant variation

Mathematics
1 answer:
il63 [147K]4 years ago
5 0
We are given with the expression <span>4y - 7x = 0. this is equal to 4y = 7x or y = 7/4 x. In this case, y is directly proportional to x where the constant of proportionality is equal to 7/4. When x increases, the value of y also increases, and vice versa.</span>
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we have

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x^{2}-2x-3=0

Group terms that contain the same variable, and move the constant to the opposite side of the equation

x^{2}-2x=3

Complete the square. Remember to balance the equation by adding the same constants to each side.

x^{2}-2x+1=3+1

x^{2}-2x+1=4

Rewrite as perfect squares

(x-1)^{2}=4

Square root both sides

(x-1)=(+/-)2

x=1(+/-)2

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