If (2,1) is the midpoint of the line segment st and the coordinates of s are (5,4) find the coordinate t.

Lines f and g are cut by the transversal d. the measure of 1 = 2x + 35 and the measure of 8 = 10x - 85. what value of x will show that lines f and g are parallel? a. 19 b. 26 c. 18 d. 15

Atriangle has side lengths of x, x+11, and 3x+5. what is the perimeter?

Which has the greater energy, light of wavelength 519 nm or light with a frequency of 5.42 x 10^8 sec^-1?