The units digit is twice the tens digit. if the number is doubled, it will be 12 more than the reversed number. find the number. 

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).

To determine the number of deer in a forest a forest ranger tags 280 and releases them back

Paul can type 60 words per minute and jennifer can type 80 words per minutes. how does paul's typing speed compare to jennifer's