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Harrizon [31]
3 years ago
15

Plz help me answer this year 7 question and explain how u got the answer.

Mathematics
1 answer:
lisabon 2012 [21]3 years ago
3 0
The answer is b and that is simply becuase an hour is 60 minutes divide the hour by 3 to get 20 then divide the speed by 3 to get the ratio
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Need help with this problem its really complicated for me
ddd [48]

You can write a proportion because the two triangles are similar

\frac{x}{x-2} = \frac{x + x + 5}{x + 1 + x - 2} (the second fraction is longer because I added the full lengths of the larger triangle)  cross multiply to get (x)(x + 1 + x - 2) = (x - 2)(x + x + 5)

which simplifies to (x)(2x - 1) = (x - 2)(2x + 5)

then 2x² - x = 2x² + 5x -4x - 10

then 2x² - x = 2x² + x - 10

then 2x² = 2x² + 2x - 10

subtract 2x² from both sides to get 0 = 2x - 10

add 10 to both sides to get 10 = 2x

divide both sides by 2 to get 5 = x

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4 years ago
Alyssa used a can of paint that was 5/6 full to touch paint her house. When she was done, the bucket was 11/30 full. What fracti
cupoosta [38]

Answer:

7 / 15

Step-by-step explanation:

Fraction before painting = 5/6

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Fraction used = 5/6 - 11/30

Lowest common factor of 6 and 30 = 30

5/6 - 11/30 = (25 - 11) / 30 = 14/ 30

Fraction used = 14/30 = 7/15

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The answer is A. x+9/x+4

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Answer:

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Step-by-step explanation:

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Step-by-step explanation:

Because u could divide then

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