8 (5x+9y) + 12 (5x9y)
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Step-by-step explanation:
Also, marginal propensity to save is opposite of marginal propensity to consume. Mathematically, in a closed economy, MPS + MPC = 1, since an increase in one unit of income will be either consumed or saved. In the above example, If MPS = 0.4, then MPC = 1 - 0.4 = 0.6.
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Answer:
40x+72y+540xy.
Step-by-step explanation:
(40x+72y)+(540xy)
= 40x+72y+540xy.
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