Problem 3 (2 points): Consider the macroeconomic model defined by National income: Y = C + I + G* (G* > 0)
Consumption: C = aY + b (0 < a < 1, b > 0)
Investment: I = cr + d (c < 0, d > 0)
Money supply: MS* = k1Y + k2r (k1> 0, k2< 0, MS* > 0)
Show that this system can be written as Ax = b, where

a/ Use Cramer’s rule to find C;
b/ Then write down the money supply multiplier for C and deduce its meaning

Select true or false to tell whether the following conditional p q is true or false. use the truth table if needed. if a week has seven days, then a year has twenty months.

Simonne used the following steps to simplify the given expression. 12 - 3(-2x + 4) step 1: 12 + (–3)·(–2x) + (–3)·(4) step 2: 12 + 6x + (–12) step 3: 12 + (–12) + 6x step 4: 0 + 6x step 5: 6x what property of real numbers was used to transition from step 3 to step 4? a. identity property of addition b. inverse property of addition c. associative property of addition d. commutative property of addition

Marya wants to factor the polynomial 36x^3 -22x^2 - 144x.which term can she add to the polynomial that would not change its grestest common factor? check all that apply