How do iI solve this 3t^2 = t + 5

On which number line are -3 and its opposite shown

Using the given information, solve for x. what is the length of ab? what is the length of rs? a) x = 2; ab = 4; rs = 8 b) x = 6; ab = 8; rs = 16 c) x = 4; ab = 6; rs = 12 d) x = 8; ab = 10; rs = 20

Which formula can be used to describe the sequence? -81 ,108,-144,192