( Please help ) (1/4 + 2/3) + ? = 0 what is the ? Value

Is δ pmr similar to δ smn ? if so, which postulate or theorem proves these two triangles are similar?

The average number of vehicles waiting in line to enter a parking lot can be modeled by the function f left parenthesis x right x squared over 2 left parenthesis 1 minus x right parenthesis endfraction , where x is a number between 0 and 1 known as the traffic intensity. find the rate of change of the number of vehicles waiting with respect to the traffic intensity for the intensities (a) xequals0.3 and (b) xequals0.6.

Write the expression as a single natural logarithm. 2 in a - 4 in y