document.write( "Question 101072: Can someone help me with this?\r
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document.write( "Six pears and three apples cost $3.90. Two pears and five apples cost $3.30. How much does one pear cost? Hint: You have two unknowns (variables), so you need two equations. Write one equation for each situation and solve the system of equations. \r
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document.write( "Let p = the cost of one pear \r
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document.write( "Let a = the cost of one apple\r
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document.write( "a. Write a system of equations that can be used to determine the cost of pears and apples. \r
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document.write( "b. Determine the cost of one pear and one apple. Use mathematics to explain how you determined your answer
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Algebra.Com's Answer #73689 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! Six pears and three apples cost $3.90. Two pears and five apples cost $3.30. How much does one pear cost? Hint: You have two unknowns (variables), so you need two equations. Write one equation for each situation and solve the system of equations. \n" ); document.write( "Let p = the cost of one pear \n" ); document.write( "Let a = the cost of one apple \n" ); document.write( "a. Write a system of equations that can be used to determine the cost of pears and apples. \n" ); document.write( "6p + 3a = 3.90 \n" ); document.write( "2p + 5a = 3.30 \n" ); document.write( "----------------- \n" ); document.write( "Multiply the 2nd equation by 3 to get: \n" ); document.write( "6p + 15a = 9.90 \n" ); document.write( "-------------- \n" ); document.write( "Subtract the 1st from this last to get: \n" ); document.write( "12a = 6 \n" ); document.write( "a = 0.50 (cost of one apple) \n" ); document.write( "--------------- \n" ); document.write( "Substitute that into 6p + 3a = 3.90 \n" ); document.write( "6p + 3*0.5 = 3.90 \n" ); document.write( "6p + 1.5 = 3.90 \n" ); document.write( "6p = 2.40 \n" ); document.write( "p = 0.60 (price of one pear) \n" ); document.write( "========================== \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( "b. Determine the cost of one pear and one apple. \n" ); document.write( " |