The equation 2x + 5y = 9 can represent

Find and test all critical numbers for the function f(x) = x3 + 9×2 – 21x – 12.

How many solutions does this system have? 10x – 7y = 10 4x + 5y = 12

Which property of vectors is incorrect?

Which plane does not contain the point (10, -3, 5)?

If f(x) = sin 3x + cos 2x, then f'(x) =

Find the correct thermodynamic description of the following  reaction that is spontaneous at some conditions:  S6(s) => 6S(g)

Assuming ideal solution behavior, what is the freezing temperature of a solution of 115.0 g of sucrose, C12H22O11, in 350.0 g of water? Kf of water = 1.86 °C/m. Sucrose molar mass = 342.3g/mol

At what temperature will a reaction become spontaneous, if its ∆S° is +100.3 J/mol and ∆H° is +48.90 kJ/mol?

Which solute will have the highest van’t Hoff factor?