Which equation is always true ?
a. 3(x+1) =3x+2
b. 4(x-1) =3x-3
c. x - 1=1 -x
d. x+3=x+2

What is the point-slope form of the equation for the line with a slope of -2 that passes through (1,4)?

The ksp expression for the system pbcl2(s) pb+2(aq) + 2 cl-(aq) is: [pbc12][pb+2][2cl-] [pb+2][cl-]2 [pb+2][2cl-]2 [pbcl2][pb+2][cl-]2 [pb+2][2cl-]2[pbcl2]

Aswimming pool had 2.5 million liters of water in it. some water evaporated, and then the pool only had 22 million liters of water in it. what percent of the water evaporated?