Ms. Walker's class set up an online fund with a goal to raise \( \$ 1,280 \) to go on a field trip. Ms. Walker starts the fund by depositing \( \$ 5 \). Each week the balance of the fund is twice the balance of the previous week. Which equation can be used to find the number of weeks, \( x \), after which the balance of the fund will reach \( \$ 1,280 \), and how many weeks will it take to reach the class goal? A. \( 1,280\left(\frac{1}{5}\right)^{x}=2 ; x=4 \) B. \( 5(2)^{x}=1,280 ; x=8 \) C. \( 1,280\left(\frac{1}{2}\right)^{x}=5 ; x=7 \) D. \( 2(5)^{x}=1,280 ; x=5 \)

uisl 3 a) \( x^{2}-12=0 \) b) \( 4 x^{2}-7 x=0 \) c) \( 6 x+12 x^{2}=0 \)

What is the solution to the equation? \( \sqrt[3]{2 x+5}=5 \) A. 240 B. 65 ( \( ) 60 \) D. 6 D. 5

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? \( 5 \log _{10} x+\log _{10} 20-\log _{10} 10 \)