Find the rate, or percent, for each of the following items. Round your answers to the nearest 0.1%.
1. Base 72; percentage 12
2. Percentage 28 base 224
3. Base 20 percentage 40
4. Base 44 percentage 99
5. Percentage 126 base 8400

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).

The tile along the edge of a triangular community pool needs to be replaced? ?

What is the missing reason in the proof? segment addition congruent segments theorem transitive property of equality subtraction property of equality?