What are the solutions to 6x squared - 5x -4=0?

What value of x will make the triangles similar by the sss similarity theorem?

The brain volumes (cm cubed) of 50 brains vary from a low of 904 cm cubed to a high of 1488 cm cubed. use the range rule of thumb to estimate the standard deviation s and compare the result to the exact standard deviation of 175.5 cm cubed, assuming the estimate is accurate if it is within 15 cm cubed

Which graph represents the equation y =4x