What is the value of x?

x =

141

Step-by-step explanation:

It is a 7 sided shape

first find the sum of interior angles

7-2 x 180 = 900

so 122 +125 +131 +107+ x-15+x+x+7 = 900

477 +3x =900

3x= 423

x=141

i am sure it will be 90 degrees.

step-by-step explanation:

  y= -3x is the required function.

step-by-step explanation:

we have been given a table:

x             y

0             0

1             -3

3             -9

-2             6

we can see that the values of y is -3 times the value of x

hence, the function would be: y= -3x.

put the values of x will give the same y as in the table that means function is satisfying the given table.