Algebra 2 help? - XP Math - Forums

 XP Math - Forums Algebra 2 help?

 07-26-2007 #1 FunnyGirl007 Guest   Posts: n/a Algebra 2 help? 1. 6, 11, 16, 21 next two terms?2. 6Î£ (1/3)^K TO three decimal placesk = 33. T(1) = -2 , T(2) = = -2 Next 5 termsTn+2 = 3tn / 2tnn and n+2 is under T4.4Î£ (4k-2) Terms of the series and sumK=35. In 1994 a cost of a car increase \$1,942 and the cost of the car is \$18,493 Write the equation. ( has to be with all the t and n stuff)6. Tn = 20-9n First 9 arithmic termsn is under T and 97. 5 and -3 three arithmetic means8. Four arithmetic means of -9 and 1119. 50 row theater has 20 seats in row 1 and 21 in row 2 and If each row has one more seat how-many seats in the theater10. Sum31Î£ (-8k+3)k=1
 07-26-2007 #2 kankles919 Guest   Posts: n/a So, it's late and I'm only gonna answer #9. If there are 50 rows and the first row has 20 and the rows get larger, then each row has at least 20 seats. 50 X 20= 1,000. Now, row two has 1 additional seat than the first row, row three has 2 additional seats than the first row. So, take 1000+1+2+3....and so on until you get to +49. There's your answer.
 07-26-2007 #3 bedbye Guest   Posts: n/a First Question is just finding the patternEach number in the series is 5 more than the previous number. Next two are 26 and 31.Maybe you should practice & get this concept down before proceeding to the algebraic problems.
 07-26-2007 #4 CwCc Guest   Posts: n/a 9. formula for an arithmetic series: (n(a1+an))/2therefore 30(20+70)/2=1350 seats
 07-26-2007 #6 mcbrocks Guest   Posts: n/a 1.26, 319.20 times 50 = 10001+2+3...+49 = 12251225 + 1000 = 2225

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