Buying-in price £12, mark-up £3 find the percentage mark-up.

I WILL GIVE BRAINLIEST!!

Divide. reduce the answer to lowest terms.5 2/3 ÷ 3 1/9

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).

According to the general equation for conditional probability if p(anb)=3/7 and p(b)=7/8 what is p(a i b)