What does this answer mean? Like, what is a “solution set” and an “identity?” I know what multiplicative (x1) and additive identities (+0) are, but what is this? What is true for any value of x? That 4 = 4? And if so, what does that even mean? Solve 2(x + 1) - (x - 2) = x + 4 for x.
SOLUTION
2(x + 1) - (x - 2) = x + 4
2x + 2 - x + 2 = x + 4
x + 4 = x + 4
4 = 4

“This is true for any value of x. The solution set is all real numbers. This equation is an example of identity.”

Astudy found that the variance in the number of vehicles owned or leased by subscribers to a magazine is .094. assume a sample of 12 subscribers to another magazine provided the following data on the number of vehicles owned or leased: 1,1,1,0,3,2,1,1,2,1,0, and 1 a) compute the sample variance in the number of vehicles owned or leased by the subscribers (to 4 decimals). b)test the hypothesis to determine whether the variance in the number of vehicles owned or leased by subscribers of the other magazine differs from .calculate the value of the test statistic (to 3 decimals).