Help meeeeeeeee please

C

Step-by-step explanation:

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