The Simon family attended a concert and visited an art museum. Concert tickets were $24.75 for adults and $16.00 for children, for a total cost of $138.25. Museum tickets were $8.25 for adults and $4.50 for children, for a total cost of $42.75. How many adults and how many children are in the Simon family?

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

if you was gonna solve for a, a is a   < -12