document.write( "Question 1201754: Suppose that the demand and supply in the automobile market are represented by the following equations:\r
\n" ); document.write( "\n" ); document.write( "Demand: P= 10 - 0.2Qd
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\n" ); document.write( "\n" ); document.write( "a. Determine the equilibrium price and quantity. \r
\n" ); document.write( "\n" ); document.write( "b. Demonstrate your answer graphically.\r
\n" ); document.write( "\n" ); document.write( "c. Suppose the price of petrol increases, demonstrate graphically its effect on the equilibrium point.\r
\n" ); document.write( "\n" ); document.write( "d. Assume that there is a technological improvement on the cars’ production, what will be its effect on the cars’ market?
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Algebra.Com's Answer #836268 by ikleyn(52780)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "They want you solve this system of two equations in two unknowns\r\n" );
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document.write( "    P = 10 - 0.2Q    (1)\r\n" );
document.write( "    P =  2 + 0.2Q    (2)\r\n" );
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document.write( "Since left sides are identical, right sides are equal\r\n" );
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document.write( "    10 - 0.2Q = 2 + 0.2Q\r\n" );
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document.write( "    10 - 2 = 0.2Q + 0.2Q\r\n" );
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document.write( "       8   =     0.4Q\r\n" );
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document.write( "       Q   =     8/0.4 = 80/4 = 20.\r\n" );
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document.write( "ANSWER.  Q = 20;  P = 10 - 0.2Q = 10 - 0.2*20 = 10 - 2*2 = 10 - 4 = 6.\r\n" );
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