document.write( "Question 1125512: on the first two psychology tests, a girl had scores of 79 and 83. she wants her average to be atleast 87. what score does she need on the third test? \n" ); document.write( "

Algebra.Com's Answer #741841 by ankor@dixie-net.com(22740) $\"\"$ $\"About$

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on the first two psychology tests, a girl had scores of 79 and 83. she wants her average to be at least 87.
\n" ); document.write( " what score does she need on the third test?
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\n" ); document.write( "let x = score required to have an 87 average\r
\n" ); document.write( "\n" ); document.write( " $\"%28%2879+%2B+83+%2B+x%29%29%2F3\"$ = 87
\n" ); document.write( "162 + x = 3(87)
\n" ); document.write( "x = 261 - 162
\n" ); document.write( "x = 99 is required on the 3rd test
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