Modern medical advances might mean people could live 200 years. In 2009, the life expectancy is about 80 years. Assume that, due to modern advances, life expectancy gains 5.8 years every decade. From 2009, in how many years would humanity achieve a life expectancy of 130 years?

2,600 divided by 80 = 32.5

step-by-step explanation:

i think it is everything has to equal 180 so, if i correct 4=c. 6=d. 8=a. 7=b. and the last question would be c. because they are parallel lines and they are congruent.

step-by-step explanation:

the reason everything has to equal to 180 is because that is how it works. i'm guessing that is its rule. 4 and 8 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 6 and 7 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 60+60 is 180. so, now you have your answer

(3x-8) or (3x+8)

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