3t-7=5t then 6t=
i do not underastand how to solve this.

Solve the equation 3x2 + 19x + 9 = 0 to the nearest tenth.

All per-unit concepts rely on ratios,meaning,to provide a type of measurement

The first-serve percentage of a tennis player in a match is normally distributed with a standard deviation of 4.3%. if a sample of 15 random matches of the player is taken, the mean first-serve percentage is found to be 26.4%. what is the margin of error of the sample mean? a. 0.086% b. 0.533% c. 1.11% d. 2.22%