document.write( "Question 327093: Define a new operation A*B = (A + B) • B. For example, 2 * 3 = 15. Evaluate (3*5)*7. \n" ); document.write( "

Algebra.Com's Answer #234265 by jessica43(140) $\"\"$ $\"About$

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So order of operations tells us that we need to perform the operation in parentheses first. Se we will calculate (3*5).
\n" ); document.write( "A * B = (A + B) • B
\n" ); document.write( "3 * 5 = (3 + 5) • 5
\n" ); document.write( "3 * 5 = (8) • 5
\n" ); document.write( "3 * 5 = 40
\n" ); document.write( "Now we plug in 40 into the orginal equation and then follow the same steps:
\n" ); document.write( "(3*5)*7
\n" ); document.write( "(40)*7
\n" ); document.write( "A * B = (A + B) • B
\n" ); document.write( "40 * 7 = (40 + 7) • 7
\n" ); document.write( "40 * 7 = (47) • 7
\n" ); document.write( "40 * 7 = 329
\n" ); document.write( "So (3*5)*7 = 329 \n" ); document.write( "

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