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Sergio039 [100]
2 years ago
5

(b) Factorise a² + 15a + 36

Mathematics
2 answers:
solmaris [256]2 years ago
5 0
(a+12)(a+3) should be right
ladessa [460]2 years ago
3 0

Answer: Hi

(a+3) (a+12)

Step-by-step explanation:

i hope this helps^_^

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there are two sizes of red and blue marbles in a box. Of the big marbles in the box, 45 are red and 3/4 are blue. The fraction o
nikklg [1K]
Big marbles = 45red 3/4 blue
Small marbles = 2/5 red    3/5 blue    24 more small blue mabrles than red marbles
What percentage of the marbles are big marbles

First of all lets working out the missing values: 
Big Marbles, 45 red, 3/4 blue. If 45 red is 1/4, then 135 (45*3) is 3/4.
Big Marbles, 45 red, 135 blue = 180 in total

For the small marbles, we do some logical thinking:
If red is 2/5, and blue is 3/5. And blue has 24 more than red.
That means 24 = 1/5
So in total there are 120 small marbles (24*5)
There are 180 big marbles 
We add these together, 120 + 180 = 300 marbles
180 / 300 = 0.6 = 60%
^ Divide the big marbles by the number of total marbles

60% of the marbles are big marbles

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3 years ago
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Sophie [7]
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3 years ago
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40 points help please
JulsSmile [24]

Answer:

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Step-by-step explanation:

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2 years ago
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a carton length of 2 1/4 feet, width of 1 3/5 feet , and height of 2 1/3 feet. what is the volume of the carton?
babunello [35]
8.4 feet cubed or 8 2/5 feet cubed
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2 years ago
Express x in terms of a and b:<br> b−7x=a−b
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Answer:

Step-by-step explanation:

b - 7x = a - b....subtract b from both sides

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x = (a - 2b) / -7....or it could be written as x = -1/7a + 2/7b

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3 years ago
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