Someone please help me lol

Undefined

Step-by-step explanation:

We see that the domain of f is (-5,5], where ( means not included, ] means included.

Therefore, since -5 is not in the domain, the value is undefined.

texaschic101 is correct for all of them expect for the last one (question 6) she needed to finish the problem by multiplying 360 by 80%

step-by-step explanation:

x=0.8x+72

x=0.8x-0.8x+72 (move like terms to the same side)

0.8x-x=72 (collect like terms)

0.8x-x=0.2x

0.2x=72 (divide both sides by 0.2)

x=360

now because it said 80% of members were 30-40 and wants to know how many members joined between the age of 30 and 40 we need to multiply 360 and 80%

360 x 80%= 288

x=288