Which is the best estimate of A.2 B.6 C.12 D.24

Evaluate the expression for the given value of the variable 2×(c2-5) for c=4

Fred has a spinner that is split into four equal sections: red, blue, green, and yellow. fred spun the spinner 688 times. which of the following would be a good estimate of the number of times the spinner lands on the green section? a. 269 b. 603 c. 344 d. 189

If f(x)=x+7 and g(x)=1/x what is (fog)(x)