Solve the following ODEs by making an appropriate change of variable: dy 1-3y-9r (b) = dr 1+ y + 3x dy (a) (v² − z²¹) = - -2xy,

Help me with A,B and C

6x y dr dy

If possible, write -5 - 4x -5-4x2x² = - 2x² as a linear combination of 2 - x + x², -2- x² and x-5-2². Otherwise, enter DNE in all answer blanks. (-2-x²)+ (x - 5 - 2x²). (2-x+x²)+

The molarity of a solute in solution is defined to be the number of moles of solute per liter of solution (1 mole = 6.02 × 1023 molecules). If X is the molarity of a solution of sodium chloride (NaCl), and Y is the molarity of a solution of sodium carbonate (Na2CO3), the molarity of sodium ion (Na+)inasolution made of equal parts NaCl and Na2CO3 is given by M = 0.5X + Y. Assume X and Y are independent and normally distributed, and that X has mean 0.450 and standard deviation 0.050, and Y has mean 0.250 and standard deviation 0.025. a) What is the distribution of M? b) Find P(M > 0.5).

If possible, write -3 – a – 2x? as a linear combination of 2 + x + x?, 2 + 2x + x² and 3 + 3x + 2x2. Otherwise, enter DNE in all answer blanks. -3 - a – 2x? = (2 +x+ a?)+ (2 + 2x + a?)+ (3 + 3x + 2a?).