If LN=54 and LM= 31, find MN

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'

Which point-slope form equation represents a line that passes through (3,-2) with a slope of -4/5

Taylor graphs the system below on her graphing calculator and decides that f(x)=g(x) at x=0, x=1, and x=3. provide taylor with some feedback that explains which part of her answer is incorrect and why it is incorrect. f(x)= 2x+1 g(x)= 2x^2+1