Which could be the first step in solving the equation represented by the model below?

3x + 4 = 2x + 6

a. add 4 negative unit tiles to both sides.
b. add 4 negative unit tiles to the left side, and add 6 negative unit tiles to the right side.
c. add 4 positive unit tiles to both sides.
d. add 6 negative unit tiles to the left side, and add 4 negative unit tiles to the right side.

The magnitude, m, of an earthquake is defined to be m=log l/s, where i is the intensity of the earthquake (measured by the amplitude of the seismograph wave) and s is the intensity of a “standard” earthquake, which is barely detectable. what is the magnitude of an earthquake that is 1,000 times more intense than a standard earthquake? use a calculator. round your answer to the nearest tenth.

What is the measure of ac? 5 units 13 units 26 units 39 units 3x- 2b 6x + 9

Will give brainliestbased on the topographic map of mt. st. helens, what is the contour interval if the volcano height is 2,950 m?