document.write( "Question 1050567: If aΔb means $\"+2ab%2B5+\"$ when a < b and 2b - a when $\"+a+%3E=+b\"$ , evaluate (3Δ9)Δ5. \n" ); document.write( "

Algebra.Com's Answer #666228 by Edwin McCravy(20056) $\"\"$ $\"About$

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If aΔb means 2ab+5 when a < b and 2b-a when a>=b , evaluate (3Δ9)Δ5.
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document.write( "First we do what's in the parentheses, which is 3Δ9\r\n" );
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document.write( "3Δ9 a case of aΔb when a < b since a=3 < b=9, so we use 2ab+5,\r\n" );
document.write( "and get 2(3)(9)+5 = 59\r\n" );
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document.write( "So we replace the (3Δ9) by 59 in (3Δ9)Δ5 and have 59Δ5\r\n" );
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document.write( "59Δ5 a case of aΔb when a ≥ b since a=59 ≥ b=5, so we use 2b-a,\r\n" );
document.write( "and get 2(5)-59 = 10-59 = -49.\r\n" );
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document.write( "Edwin

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