Which of the following points is located in the third quadrant of the coordinate plane? A. (7, -15)

B. (7, 15)

C. (-7, -15)

D. (-7, 15)

C. (-7, -15)

Step-by-step explanation:

Both the x- and the y-coordinates of a point in the third quadrant are negative.  The given point C. (-7, -15) is the only one of the four choices that satisfies this criterion.

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so: