Simply by combining like terms that are on the same side of the equation. which terms can be combined? -7+12-2x=23+13x

Which expression is equivalent to (3^2)^-2 a.-81 b.-12 c.1/81 d.1/12

Pick the expression that matches this description: a polynomial of the 5th degree with a leading coefficient of 7 and a constant term of 6 (choice a) 7x^5+2x^2+6 (choice b) 7x^6−6x^4+5 (choice c) 6x^7−x^5+5 (choice d) 6x^5+x^4+7

5,600 x 10^3 = a) 560 b) 5,000,600 c) 5,600,000 d) 56,000