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The first one is true, also the second one. Third one as well and the forth also. They all are solutions of the equations. Weird but true.

1) x= -6 isn't the correct solution.

2) x=15 is the correct solution.

3) x= -1 isn't the correct solution.

4) x= -4/5 is the correct solution.

Step-by-step explanation:

1) 2x=9+3

2x=12

x=6

2) x=17-2

x=15

3) (multiply both members per 12)

3x-4x=-1

-x=-1

x=1

4) -3x-15=2x-11

-3x-2x=15-11

-5x=4

x= -4/5

john earns $14.00 for two hours of work.

the answer would be d.

step-by-step explanation:

move all variables to the left side and all constants to the right side

(x−3)^2+(y−1)^2=16

this is the form of a circle. use this form to determine the center and radius of the circle.

( x − h ) 2 + ( y − k ) 2 = r 2

match the values in this circle to those of the standard form. the variable   r   represents the radius of the circle,   h   represents the x-offset from the origin, and   k   represents the y-offset from origin.

r = 4

h = 3

k = 1

the center of the circle is found at   ( h , k ) .

center:   ( 3 , 1 )

these values represent the important values for graphing and analyzing a circle.

center:   ( 3 , 1 ).

radius:   4