Set 4 Interpret Algebraic Expressions in Real-World Problems Identify and interpret the parts of each expression. 1) A pen costs \( \$ 2.50 \). The expression \( 4 n+2.50 \) represents the cost of buying 4 notebooks and a pen. What is the product in the expression? What does the product represent? 2) Henry has 50 apples. He gives 4 apples each to \( f \) friends. What is the difference in the expression \( 50-4 f \) ? What does the difference represent? 3) The number of roses and daisies in 5 bouquets is \( 5(r+d) \). What is the sum in the expression? What does the sum represent?

В ар иант 2 1. Преобразуйте в многочлен. а) \( (x-6)^{2} ; \)

It would take Charlene and Gina 18 minutes to organize Charlene's comic book collection if they work together. If Gina works alone, it would take her 15 minutes longer than it would take Charlene working alone. When \( x \) represents the number of minutes it takes Charlene to organize the comic book collection working alone, the situation is represented by this equation: \( \frac{1}{x}+\frac{1}{x+15}=\frac{1}{18} \), Which value is a solution of the rational equation that must be discarded because of the context? A. \( x=0 \) B. \( x=-9 \) C. \( x=-15 \) D. \( x=-30 \)

Which expressions are equivalent to the given expression? \( 5 \log _{10} x+\log _{10} 20-\log _{10} 10 \)

Enter the correct answer in the box. Rewrite the expression \( 2 \sqrt[4]{x^{7}} \) using rational exponents. \( \begin{array}{lll}\frac{\square}{\square} & \text { (ㅁ) } \mid \text { 미 } \square^{\square} \mid+--\end{array} \)

5. \( \left(16 x^{2}\right)^{-1} \)