document.write( "Question 101072: Can someone help me with this?\r
\n" ); document.write( "\n" ); 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
\n" ); document.write( "\n" ); document.write( "Let p = the cost of one pear \r
\n" ); document.write( "\n" ); document.write( "Let a = the cost of one apple\r
\n" ); document.write( "\n" ); document.write( "a. Write a system of equations that can be used to determine the cost of pears and apples. \r
\n" ); document.write( "\n" ); 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)\"\" \"About 
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
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\n" ); document.write( "Multiply the 2nd equation by 3 to get:
\n" ); document.write( "6p + 15a = 9.90
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\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)
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
\n" ); document.write( "b. Determine the cost of one pear and one apple.
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