Simplify + 13) + (-9a - 2) - (-7a - 3). a: 12 b: -12 c: 14a - 12 d: 14a - (-12) i solved this problem yet i don't know if i did it right. i got b: -12. can someone confirm if i'm right or not? .

Given the choice between receiving $1.000.000 in one month or a single penny-doubled everyday for the period of one month; which option would you choice? show your work to support your answer. (assume that 1 month=30 days)

Divide. –4.2 ÷ 6 = a –0.7 b 0.7 c –7 d 7 me

Charlie is at an amusement park that has 18 different rides. each ride costs $1.75. the function c(r) = 1.75r represents the total amount of money that charlie will spend if he goes on r rides, but he never goes on the same one more than once. what domain and range are reasonable for the function?