# Posts by olav

Total # Posts: 19

**math**

( (5 x 5) x 2 ) + 5 = (25 x 2) + 5 = 55.

*December 12, 2010*

**Gr. 9 Math (continued)**

Thank you for all your help.

*December 12, 2010*

**Gr. 9 Math (continued)**

I looked at it another way. I used rectangle FEBH; area = 9 x EF. I used rectangle AEFG; area = 4 x EF. Ratio of area FEBH to AEFG = 2.25 The square root of area is ratio of the perimeters = 1.5 Perimeter of AEFG = 2 x 9 + 2 x EF Perimeter of FEBH = 2 x 4 + 2 x EF. Since FEBH ...

*December 12, 2010*

**Gr. 9 Math (continued)**

I don't see a problem but I will rewrite the structure. Make two rectangles attached together. Call the first rectangle ABHG (AG top, BH bottom). Call the second rectangle GHCD (HC top, GD bottom). Draw a horizontal line from line AB to line GH and name the points E on ...

*December 12, 2010*

**math**

Simple. 250 x (40/100) x (46/100) = 250 x .4 x .46 = 46 applicants will be selected.

*December 12, 2010*

**Gr. 9 math**

I reposted a better structure at 1:58 thank you for your help so far.

*December 12, 2010*

**Gr. 9 math**

I don't see a problem but I will rewrite the structure. Make two rectangles attached together. Call the first rectangle ABHG (AG top, BH bottom). Call the second rectangle GHCD (HC top, GD bottom). Draw a horizontal line from line AB to line GH and name the points E on ...

*December 12, 2010*

**Gr. 9 math**

There is one large rectangle ABCD, top line is AD and bottom is BC. A vertical line is drawn from the top to bottom called GH (between points AD and BC). A line is drawn from left to right called EF (between points AB and GH). AEFG is Rectangle 1. EBHF is Rectangle 2. GHCD is ...

*December 12, 2010*

**Math**

look them up using goog.le

*December 12, 2010*

**Algebra**

There is no difference between 1-2 and 2-1 if you disregard the + or - in the final answer. Sometimes when I do calculations on the calculator and I forget which number is the larger, I will end up with a negative answer. I just remember that the answer should be positive. ...

*December 12, 2010*

**computer architecture**

A word is two bytes. A byte has 8 bits.

*December 12, 2010*

**Grade 9 Math**

There is one large rectangle ABCD, top line is AD and bottom is BC. A vertical line is drawn from the top to bottom called GH (between points AD and BC). A line is drawn from left to right called EF (between points AB and GH). AEFG is Rectangle 1. EBHF is Rectangle 2. GHCD is ...

*December 12, 2010*

**grade 9 math**

Does this work for all trapezoids ? Is this true for all similar enclosed figures ? Can you help me with my other question posted minutes later than this one ?

*December 12, 2010*

**grade 9 math**

I am still lost. How come the areas of similar figures (trapezoids) are proportional to the squeare of their corresponding perimeters.

*December 12, 2010*

**grade 9 math**

Trapezoid ABCD, top AD and bottom BC are parallel. AD is the smaller of the two parallel lines. Left AB is 45, bottom BC is 60, right CD is 30, top AD is unknown. Trapezoid EFGH is similar to ABCD, top EH and bottom FG are parallel. EH is the smaller of the two parallel lines...

*December 12, 2010*

**math**

20 percent is actually 20/100 or .2 87/8 is actually 10.875 The result is .2 x 10.875 or using fractions (20 x 87) / (100 x 8) = 1740 / 800 = 2 140/800 = 2 7/40 or 87/40

*December 12, 2010*

**math**

There is on large rectangle ABCD, top line is AD and bottom is BC. A line is drawn from the top to bottom called GH. A line is drawn from left to right called EF. AEFG is Rectangle 1. EBHF is Rectangle 2. GHCD is Rectangle 3. All three rectangles are similar. Length of line AE...

*December 11, 2010*

**math**

------------------ 4cm | (1) | | |_____| | | | | 9cm | (2) | (3) | | | | ------------------ Rectangle 1 & 2 & 3 are similar. What is the area of Rectangle 3.

*December 11, 2010*

**math**

Trapezoid ABCD, top and bottom are parallel. Left is 45, bottom is 60, right is 30, top is unknown. Trapezoid EFGH is similar to ABCD, top and bottom are parallel. Top is 10, other sides are unknown. Area of ABCD is 9 times larger than EFGH. What is the perimeter of EFGH ?

*December 11, 2010*

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