Solve each equation for the unknown variable. 1. 273x=9 2. PRACTICE 7.1 " 25-k 53 625 = 3. L3 -3x+3 = 27x 4. (52x)(x+2)=1 5. (7)4x2 78 = 7 6. 32-3a-264a-1 7. The website Bankrate.com publishes a weekly list of the top savings deposit yields. In the category of 3-year certificates of deposit, the following were listed. Which bank should you chose for a $5000 investment? Decide by completing the table. Bank APR The Brust Price Bank 3.12% Compounded Quarterly Initial Investment Value after 3 Yrs $5000 $ully.com 3.00% Daily $5000 Kelly-Green$ Bank 2.96% Monthly $5000 BeanCounters.com 2.75% Continuously $5000 8. Find each missing value in the table. Initial Value % Change Growth or Decay? Equation 1.25 Loss of 25% Decay y = 1.25(1-0.25)* y = 1.25(1.25)* -5 2.45 Loss of 94% Gain of 415% a Loss of r% y = 0.75(1.25)* y = 0.75(0.75)* y = 3(2)* 9. The equation y = 25,000(1+0.04)* models the salary of an employee who receives an annual raise. Give the meaning of each number and variable in this equation. 25,000: 0.04: 1: A ball is dropped from a height of 12 feet and is allowed to bounce over and over. The height of each bounce is modeled in the exponential DECAY model below. Bounce Height (ft) 0 12 1 2 7.8 5.07 3.2955 2.142075 3 4 8 --- 100 --- ??? --- ??? 10. Function: 11. 8th Bounce: 12. 100th Bounce For 13-15, sketch the graph of each exponential function by doing the following: Sketch the asymptote, label at least two distinct coordinate points on each graph, and write the domain and range of each function. x 13. y = 2 2 (3) * -x Growth or Decay? 14. y = Growth or Decay? 15. y = -2(3) * Growth or Decay? Domain: Range: Domain: Range: Domain: Range: Need Help? Watch the Unit 7 Review Skillz Vi Change Up! Solve for the missing side lengths. Leave your answers in simplest radical form. 16. 17. x 4 60 A x 45 y 2 b 18. 19. 45 72 52 5 60 x * a y QUICK REVIEW!!!