Deniel's scribpost 8-16 January 6th 2010 Question 16#

QUESTION 16#

Hey guys okay I really don't know if I was to do this question or not today but ill do it anyway...

The question I chose was Question 16 and it was the hard question but i figured it out anyway so here is my solution:

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What is the length of the red diagonal in the box? Express your answer to the nearest tenth of a millimetre.

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Here is my answer to this problem:

(Sorry if i didn't add any the letters a,b,c because it was hard putting them on the picture.)

When I was estimating I tried to figure out the problem by seeing what the question meant so here's what I did:

I multiplied the numbers by 2 making it 218 so I squared that number making it 14.8 because I rounded it by a tenth which makes this my solution but my answer is gonna be next.

__+__+__+__+__+__+____+__+__+__+__+__+____+__+__+__+__+__+__+

All I did was:

A²+B²+C² = ???

5mm² + 7mm² + 12mm² =???

So I multiplied them making an answer: (5x5)+(7x7)+(12x12)=218

So I squared the number making an answer which was: √218 = 14.7 rounding it making it 14.8

so that is my answer for Question 16#

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Question 15

HAPPY NEW YEAR!

Here is question 15:

HOW LONG IS THE LINE?









To find the answer, we have to use the Pythagorean relationship. From looking at the graph we can tell that the legs, (green) have lengths of 2cm and 4cm. We have to find the length of the hypotenuse, (red). Our formula is: a squared + b squared = c squared.

a squared + b squared = c squared

2cm squared + 4cm squared = c squared

(2cm x 2cm) + (4cm x4cm) = c squared

4cm + 16cm = c squared

20cm= c squared

By doing this we have figured out the area of the hypothetical square attached to the hypotenuse. Now we have to find the square root of that number to find the length of the hypotenuse.





the square root of 20= 4.4 (approx.)





The length of the line is approximately 4.4cm.





Thanks for reading! Please comment :)





~Laura~

#7 and 8 on page 51 and 52

HEY EVERYBODY SORRY THAT THIS IS SO LATE

#7. write each ratio in fraction form. Do NOT write in lowest terms.

A] you spend $4 out of $10.
ANSWER: 4/10

B] A team won three games and lost six. what is the ratio of games won to games played?
ANSWER: 6/9

C] A bag contains 12 red and 3 blue beads. compare blue beads to total beads.
ANSWER: 3/15

D] A pond contains 27 guppies and 33 goldfish. What is the ratio of guppies to total fish?
ANSWER: 27/60


#8. Identify the missing number to make an equivalent fraction.



A] 1/2 = 4\8

B] 4/5 = 12/15

C] 2/7 = 6/21

D] 1/4 = 3/12

E] 21/49 = 3/7

F] 4/3 = 12/15