53=−19z+5+7z What is the value of z?

Z= -4

Step-by-step explanation:

first we are going to add 7z to -19z which is -12z

Then we are going to subtract 5 to both sides

53=-12z+5

-5        -5

which then makes it

48= -12z

Then we divide 48 by -12 and we get

Z= -4

the circle graph is not a function.

step-by-step explanation:

the graph of the circle is not a function.

because for a graph to be a function, each value of x must give one value of y

in the circle, the values of x for -2< x< 2 each give 2 values of y.

hence this is not a function.

which expression represents the approximate length of bc?

step-by-step explanation: