For an arithmetic sequence where a 1 = 17 and the common difference is 5, find s 7 . a. 219 b. 235 c. 229 d. 224

Prove that the value of the expression 7^8–7^7+7^6 is divisible by 43.

Add, subtract, multiply, or divide as indicated. list any restrictions for the variable(s) and simplify the answers when possible. 1) x-2 / x+5 + 3x / 2x-1 2) x+6 / x-6 - x^2 / x+6 3) x+9 / x-4 + x+2 / x^2-11x+28 4) x / x^2-64 + 11 / 2x^2+11x-40 5) 5 / x + 11 / x-3 - x-4 / x^2+2x-15

Factor the gcf out of the polynomial 9x^6+6x^4+15x^3