document.write( "Question 698736: (1)Solve the formula for the specified variable.
\n" ); document.write( " F = 9/5C + 32 for C
\n" ); document.write( "(2)Solve the formula for the specified variable.
\n" ); document.write( " A = 1/2h(a + b) for a
\n" ); document.write( "(3)Solve the formula for the specified variable.
\n" ); document.write( " d = rt for r
\n" ); document.write( "(4)Solve the equation by factoring.
\n" ); document.write( " 15x^2 + 26x + 8 = 0
\n" ); document.write( "

Algebra.Com's Answer #431018 by vidya p(12)\"\" \"About 
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1)Solve the formula for the specified variable.
\n" ); document.write( " F = 9/5C + 32 for C
\n" ); document.write( "Solution:
\n" ); document.write( " F = 9/5C + 32 for C
\n" ); document.write( "F - 32 = 9/5C
\n" ); document.write( "hence C = 5(F - 32)/ 9\r
\n" ); document.write( "\n" ); document.write( "(2)Solve the formula for the specified variable.
\n" ); document.write( " A = 1/2h(a + b) for a
\n" ); document.write( "Solution: \r
\n" ); document.write( "\n" ); document.write( " A = 1/2h(a + b) for a
\n" ); document.write( " 2A/h = ( a + b)
\n" ); document.write( " 2A/h - b = a
\n" ); document.write( "a= (2A-bh)/ h\r
\n" ); document.write( "\n" ); document.write( "(3)Solve the formula for the specified variable.
\n" ); document.write( " d = rt for r
\n" ); document.write( "Solution:
\n" ); document.write( "d = rt
\n" ); document.write( "hence r= d/t\r
\n" ); document.write( "\n" ); document.write( "(4)Solve the equation by factoring.
\n" ); document.write( " 15x^2 + 26x + 8 = 0
\n" ); document.write( "Solution:
\n" ); document.write( "here a=15 , b= 26, c = 8
\n" ); document.write( "ac = product = 15 * 8
\n" ); document.write( "find the two factors of 120 , such that there sum is 26
\n" ); document.write( "120 = 20 * 6
\n" ); document.write( "26 = 20 + 6 ,
\n" ); document.write( "therefore: 15x^2 + 26x + 8 = 0
\n" ); document.write( "15x^2 + 20x + 6x + 8 = 0
\n" ); document.write( "5x( 3x + 4) + 2( 3x + 4) =0
\n" ); document.write( "( 3x + 4) (5x+2)=0
\n" ); document.write( "3x+4= 0 , or 5x + 2 =0
\n" ); document.write( "x = -4/3 or x = -2/5
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