If R is the midpoint of QS, RS=2x-4 , ST=4x-1,RT =8x-43, find qs
Geometry

The sum of the reciprocal of a positive number and the reciprocal of 2 more than the number is 3/4 equation: the number is

He mass of a single atom of carbon can be found by dividing the atomic mass (12.01 g) by 6.022 x 10^23. which is the mass of a single carbon atom, correctly written in scientific notation with the correct number of significant figures?

3x + 4y = 5 x- 3y = -7 solve by substitution