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Q: Is this a nonlinear equation 5x equals y-2?

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y=5xx2+y2=26Substitute the first equation into the second for y.x2 + (5x)2 = 26x2 + 25x2 = 2626x2 = 26x2 = 1x = SQRT(1) = 1 & -1y = 5*1 = 5y = 5*-1 = -5So the solutions are: (1,5) & (-1, -5)

Type your answer here. Find the radius for a circle with the equation x2 plus y2 equals 9? ..

x2 + y2 = 2r2

y2=x3+3x2

y2 = 169 Square root both sides: y = 13

5. A circle with centre (0,0) has equation: x2 + y2 = radius2 With: x2 + y2 = 25 = 52 The radius is 5.

Equation of a circle centre the origin is: x2 + y2 = radius2 ⇒ radius = √9 = 3.

7

9

y=±√15

8

If this is the equation of a circle, the answer is 11, except that there needs to be a plus sigb between the x2 and the y2

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