If 9a + 9b + 9c = 5, what is 72a + 72b + 72c

40

Step-by-step explanation:

9a + 9b + 9c = 5

We want 72a

72a/9a = 8  so multiply the first equation by 8

8(9a + 9b + 9c) = 5*8

72a +72b +72c = 40

40

Step-by-step explanation:

Divide all three terms of 72a + 72b + 72c by 8.  Result:  8(9a + 9b + 9c).

We are told that 9a + 9b + 9c = 5.    Thus, 8(9a + 9b + 9c) = 8(5) = 40

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.