Identifique a(s) variável (is) em cada expressão algébrica a seguir. a) 4× b) -2a + 7 c) 7xy d)2(p + q)

2

Step-by-step explanation:

To be sincerely honest in my humble opinion without being sentimental and of course, without offending anyone who thinks differently from my opinion but rather looking into this serious matter with perspective distinction and without condemning anyone's point of view, I honestly think and believe that I have nothing to say.

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.