The point (2, 18) is an ordered pair in a proportional relationship. What equations represents this relationship? y = 1/9x

y = 18x

y = 9x

y = 2x

y = 9x

Step-by-step explanation:

If you plug in the point into each equation, you get:

y = 1/9x

18 = 1/9 * 2

18 = 2/9

not true

y = 18x

18 = 18 * 2

18 = 36

not true

y = 9x

18 = 9 * 2

18 = 18

true, so this is the answer

y = 2x

18 = 2 * 2

18 = 4

not true

10/60

step-by-step explanation:

if you divide 10 by 60 the answer is 0.166666 while if you divide or solve the other problems it equals 0.6

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15