Center of triangles geometry acellus pls help

Step-by-step explanation:

All the vertices of triangle are equal distant from circum center.

RC = PC = QC

RC = PC

5x - 15 = 3x + 7

Add 15 to both sides

5x = 3x + 7 + 15

5x = 3x + 22

Subtract 2x from both sides

5x- 3x = 22

     2x = 22

Divide both sides by 2

x = 22/2

x = 11

QC = 51 - x

     = 51 - 11

QC = 40

1.4

2.3

step-by-step explanation:

the formula for the constant of variation is

y= kx

divide each side by x

y/x =kx/x

y/x =k

we know a and y

1.   y/x = k

4/1 =4

check the other values to make sure they are the same

8/2 = 4   12/3 =4   and 16/4 =4  

the constant of variation is 4

2.   y/x = k

3/1 =3

check the other values to make sure they are the same

6/2 = 3   9/3 =3   and 12/4 =3  

the constant of variation is 3

.bjbjk.b,j.l.

step-by-step explanation: