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Reil [10]
2 years ago
9

Factorise the following

Mathematics
2 answers:
Luba_88 [7]2 years ago
5 0

Please find attached photograph for your answer. Hope it is alright.

krek1111 [17]2 years ago
5 0

Answer:

(5x + \frac{3}{10} )(3x - \frac{7}{10})

Step-by-step explanation:

The expression is a difference of squares and factors in general as

a² - b² = (a + b)(a - b)

Then

(4x - \frac{1}{5} )² - (x + \frac{1}{2} )²

= (4x - \frac{1}{5} + x + \frac{1}{2} )(4x -

= (5x + \frac{3}{10} )(3x - \frac{7}{10} )

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Start with

-2x-4 < 3x+21

Add 2x to both sides:

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Divide both sides by 5. Since it is positive, we don't have to change the inequality sign:

-5 < x

So, the answer is x > -5


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Mr. Wallace needs to divide his class or 23 students into 9 groups. Each group can have two or three students. If a is the numbe
IRINA_888 [86]

Answer:

d)  Mr.Wallace can use the following equations:

    a + b = 9

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Step-by-step explanation:

Here, the total number of students = 23

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Each group can have 2 or 3 students.

a is the number of  groups of 2.

⇒ Total students in a groups  = a x (Number of  student in each group)

= a x 2 = 2 a

b is the number of groups of 3

⇒ Total students in b groups  = b x (Number of  student in each group)

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So, according to the question:

Total number of groups formed = 9

⇒ a + b = 9

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or Number of students in  ( a  group + b group ) = 23

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Hence, Mr.Wallace can use the following equations:

a + b = 9

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3 years ago
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