Me !

which function has an inverse that is a function?

b(x) = x^2 +3
d(x)= -9
m(x)= -7x
p(x)= ixi

which function has an inverse that is also a function?

-4,3 -2,7 -1,0 4,-3 11, -7

-4,6 -2,2 -1,6 4,2 11,2

-4,5 -2,9 -1,8 4,8 11,4

-4,4 -2,-1 -1,0 4,1 11,1

Researchers were interested in whether relaxation training decreases the number of headaches a person experiences. they randomly assigned 20 participants to a control group or a relaxation training group and noted the change in number of headaches each group reported from the week before training to the week after training. which statistical analysis should be performed to answer the researchers' question?

If i have 20$ and i gave 5$ away how much i got

James was playing a game with his friends. he won 35 points. then he lost 15, lost 40 and won 55. how did he come out