1. A farm has 30 animals, consisting of chickens (2 legs) and pigs (4 legs). There are 80 legs in total. Let $c$ be chickens and $p$ be pigs. Which system of equations models this situation?
2. A bakery sold 40 items, including cookies for 2 dollars each and brownies for 3 dollars each. If the total sales were 105 dollars, how many brownies were sold? ___
3. Simplify the expression $(2a^5b^{-3})^4$. Write your answer using only positive exponents. ___
4. Which expression is equivalent to $(5m^2n^3)^2$?
5. A player answers 20 questions in a trivia game. Easy questions are worth 3 points and hard questions are worth 5 points. If the player scored 76 points, how many hard questions did they answer? ___
6. A farm has 30 animals, consisting of chickens ($c$) and pigs ($p$). There are 80 legs in total. Chickens have 2 legs and pigs have 4. Which system of equations models this situation?
7. A school sold 50 items at a fundraiser, earning 85 dollars. Candy bars ($c$) cost 2 dollars and sodas ($s$) cost 1 dollar. How many candy bars were sold? ___
8. A theater sold 100 tickets for 2600 dollars. General tickets ($g$) cost 20 dollars and VIP tickets ($v$) cost 50 dollars. After substituting to solve for $v$, which equation results?
9. A parking lot contains 25 vehicles, which are either cars ($c$) or motorcycles ($m$). There is a total of 80 wheels. If cars have 4 wheels and motorcycles have 2, how many motorcycles are in the lot? ___
10. A stand sells apples ($a$) for 2 dollars and oranges ($o$) for 3 dollars. In one day, 50 fruits were sold for 120 dollars. Which statement correctly describes the equations for this problem?