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Lisa I.

Math tutor specializing in algebra

Chicago, IL (60616)

Travel radius
5 miles
Hourly fee
$35.00
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To do this, you need to know what fraction the wedge represents, which should be given as part of the problem. Either the wedge is defined as being 1/6 or 1/8 or something like that, or the length of the arc segment will be given so that you can compare it to the perimeter to determine this. For...

–x + 3 > 7 (answer)

-x + 3 > 7 -x + 3 - 3 > 7 - 3    This step is straightforward and the same as an equality. -x > 4    It's this next step that confuses a lot of students. -x/-1 < 4/-1   When you divide out the negative, you flip the sign So...

See Nataliya's answer for the full explanation. The key point where you went wrong was on b2. The b value is -1, which means the entire value including the negative sign is being squared, (-1)2=1. So the value under the radical should have been 1+80=81 and you accidentally ended up with...

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