20 points and brainliest to the best correct answer, only number 14, thanks.

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.

Find the vertex for the parabola given by the function ƒ(x) = −3x2 − 6x.

What is the hypotenuse of a triangle with 4 ft and 5 ft