R-2,R-1 and 3R are 6,7,and 8 terms of an arithmetic progression. Find the 1st term and the sum of 12th and 13th terms of progression​

Answer is in the photo. I couldn't attach it here, but uploaded it to a file hosting. link below! Good Luck!

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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

answer: a) 56% women

b)44% men

step-by-step explanation: