document.write( "Question 40713: 92. Sam must have an average of 70 or more in his summer course to obtain a grade of C.His first three test grades were 75,63,and 68.write an inequality representing the score that sam much get on the last test to get a C grade. \n" ); document.write( "

Algebra.Com's Answer #26105 by Earlsdon(6294) $\"\"$ $\"About$

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Sam's average score, including the score of x on his last test must be at least 70.(70 or more)\r
\n" ); document.write( "\n" ); document.write( "The average (mean) is found by adding the four scores and dividing the sum by 4, and this must be 70 or more.\r
\n" ); document.write( "\n" ); document.write( " $\"%2875%2B63%2B68%2Bx%29%2F4+%3E=+70\"$
\n" ); document.write( " $\"%28206%2Bx%29%2F4+%3E=+70\"$ Multiply both sides by 4.
\n" ); document.write( " $\"206%2Bx+%3E=+280\"$ Subtract 206 from both sides.
\n" ); document.write( " $\"x+%3E=+74\"$ This is the inequality representing the score that Sam must get on the last test.\r
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