document.write( "Question 515712: Rita has scored 64, 71, and 83 on her previous three tests. What score does she need on her next test so her average is 78? \n" ); document.write( "

Algebra.Com's Answer #344131 by oberobic(2304) $\"\"$ $\"About$

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(64+71+83+x)/4 = 78
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\n" ); document.write( "(64+71+83+x) = 4*78
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\n" ); document.write( "218 +x = 312
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\n" ); document.write( "x = 94
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\n" ); document.write( "Rita needs at least a 94 on the fourth test to raise her average to 78.
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