document.write( "Question 768533: Can someone please help me???!!?\r
\n" ); document.write( "\n" ); document.write( "-14x = -632 - 26y
\n" ); document.write( " y = (7/13)x - 316/13
\n" ); document.write( "A Parallel
\n" ); document.write( "BPerpendicular
\n" ); document.write( "CNot Parallel and Not Perpendicular
\n" ); document.write( "DVertical
\n" ); document.write( "E Horizontal \r
\n" ); document.write( "\n" ); document.write( "Mark leaves home and drives at a constant speed, on his way to the beach. He stops to have lunch. Two hours after leaving the restaurant, he has traveled 110 miles. Four hours after leaving the restaurant, he has traveled 210 miles. How far from home was Mark when he stopped for lunch?
\n" ); document.write( "A 55 miles
\n" ); document.write( "B40 miles
\n" ); document.write( "C20 miles
\n" ); document.write( "D10 miles
\n" ); document.write( "E 50 miles
\n" ); document.write( "F 20 miles \r
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\n" ); document.write( "\n" ); document.write( "ps: I think its 55, right? im not so sure \n" ); document.write( "

Algebra.Com's Answer #468351 by ramkikk66(644) $\"\"$ $\"About$

You can put this solution on YOUR website!


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document.write( "Prob 1:
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document.write( "-14x = -632 - 26y 
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document.write( "y = (7/13)x - 316/13 \r
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document.write( "1st eqn can be rewritten as:
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document.write( " Dividing both sides, by 26
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document.write( " Simplifying
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document.write( "This is the same as the second line! So the two equations refer to the same
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document.write( "line - None of the choices are correct.\r
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document.write( "Prob 2:
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document.write( "Consider the period between 2 hours and 4 hours. At the end of 2 hours, he was 110
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document.write( "miles away, and at the end of 4 hours, he was 210 miles away. So in 2 hours,
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document.write( "he has travelled (210-110) = 100 miles.
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document.write( "So the average speed = 100/2 = 50.\r
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document.write( "That means, in the 2 hours after leaving the restaurant, he would have travelled
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document.write( "(50*2) = 100 miles as well. But it is stated that he has travelled a TOTAL 
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document.write( "distance of 110 miles at that time. So, the distance from his home to the 
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document.write( "restaurant is (110 - 100) = 10 miles. Ans D.\r
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document.write( "Hope you got it :)\r
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