653*8 in partial-product multiplication

Find the sum of the first 8 terms of the following sequence. round to the nearest hundredth if necessary.

Which is the most efficient first step to solve x in the equation 3.7x - 18 = -4.3x -34 a. add 3.7x to both sides of the equation. b. add 4.3x to both sides of the equation. c. subtract 18 from both sides of the equation. d. subtract 34 from both sides of the equation.

Which expression is equivalent to 2x^2+7x+4?