4. (10 pts) A study is conducted to estimate the difference in the mean occupational exposure to radioactivity in computer science students in the years 2000 and 2008. These data based on independent samples of students for the 2 years are obtained:

2x + 8

step-by-step explanation:

yes

step-by-step explanation:

so of course you want to start by plugging the 5 in which goes to 7(5)+3(5)=50 because 7*5=35 and 3*5=15 and then add them together, then plug in the 5 to the other equation as well 9(5)+5=50 because 9*5= 45 and then add 5 and so yes they are equivalent.