High School Algebra I Semester 1 Study Guide
High School Algebra I Semester 1 Study Guide
High School Algebra I Semester 1 Study Guide
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<strong>High</strong> <strong>School</strong> <strong>Algebra</strong> I<br />
<strong>Semester</strong> 1 <strong>Study</strong> <strong>Guide</strong><br />
22 Find the two numbers whose sum is 9 and<br />
difference is -5.<br />
Let<br />
and<br />
one of the numbers (the lesser one)<br />
the other (greater) one.<br />
22΄ You Try.<br />
22) Find the two numbers whose sum is<br />
12 and difference is -4.<br />
Then: and .<br />
According to the second equation,<br />
. Substituting for in the first<br />
equation gives:<br />
Substituting for<br />
in the first equation gives:<br />
Therefore, the numbers are 2 and 7.<br />
9.0<br />
Page 14 of 19 MDC@ACOE (AUSD) 09/13/10
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