Can somebody plz help answer both of these 2 questions!!! I don’t really get wat simplify it means... (WILL MARK BRAINLIEST
Thanks :D

If kn = 9 cm, mn = 21 cm, rs = 42 cm, and ps = 18 cm, what is the scale factor of figure klmn to figure pqrs?

Which expression is equivalent to 5r6141 2r+st6

For the rule of 78, for a 12-month period, the last term in the sequence is 12 and the series sums to 78. for an 10 month period, the last term is and the series sum is . for a 15 month period, the last term is and the series sum is . for a 20 month period, the last term is and the series sum is