Homework Help: Algebra help

Posted by Brianna on Wednesday, October 19, 2011 at 5:59pm.

Find each percent of change. Describe the percent of change as an increase or decrease. Round to the nearest tenth if necessary.

15lbs to 18lbs

$38 to $65

125lbs to 143lbs

Algebra help - Ms. Sue, Wednesday, October 19, 2011 at 6:01pm
These are all increases.

18 - 15 = 3

3/15 = 0.2 = 20%

Try the others, and I'll check your answers.
Algebra help - Brianna, Wednesday, October 19, 2011 at 6:20pm
Thank you! Are these right?

$38 to $65
65-38=27
27/38=0.710 = 70%

125lb to 143lb
143-125=18
18/125=0.144= 14%
Algebra help - Ms. Sue, Wednesday, October 19, 2011 at 6:32pm
You're close.

27/38 = 0.7105 = 71.1% rounded to the nearest tenth

18/125 = 0.144 = 14.4%
Algebra help - Brianna, Wednesday, October 19, 2011 at 6:46pm
Ok. Now I have a question about finding the minimum and maximum possible areas for rectangles with the following areas. This is what I got can you check please?

7 mi x 8 mi
Minimum 7.5x 6.5= 48.75 mi
Maximum 8.5x 7.5= 63.75 mi

12 km x 5 km
Minimum 11.5x4.5= 51.75 km
Maximum 12.5x5.5= 68.75 km

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