What is the length of MN?

4 units
V52 units
V10 units
6 units

I need the answer ASAP

Hannah works at the mall selling book bags. she sold 35 book bags in 5 hours. how many book bags did she sell per hour?

Simplify a7/a4 a) 1/a3 b)-a/a2 c)a4/a3 d)a3

Each month, a shopkeeper spends 5x + 14 dollars on rent and electricity. if he spends 3x−5 dollars on rent, how much does he spend on electricity? for which value(s) of x is the amount the shopkeeper spends on electricity less than $100? explain how you found the value(s).