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allsm [11]
3 years ago
5

3(12-8)/2*5-4 simplify or evaluate the following expressions

Mathematics
1 answer:
vekshin13 years ago
4 0

Answer:

26

Step-by-step explanation:

12-8=4

3(4)=12

12/2=6

6*5=30

30-4

26

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eduard
15-1/6n=1/6n-1
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(Constructed Response) Determine whether the binomial, 9x² - 49, is a difference of
vovikov84 [41]

Answer: It is a difference of two squares, and it factors to (3x-7)(3x+7)

=============================================================

Explanation:

We can write the 9x^2 as (3x)^2 since

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The 49 can be written as 7^2 because 7^2 = 7*7 = 49.

This means 9x^2 - 49 is the same as (3x)^2 - 7^2. We have a difference of two squares.

The difference of squares factoring rule is

a^2 - b^2 = (a-b)(a+b)

which we have a = 3x and b = 7 in this case

So,

a^2 - b^2 = (a-b)(a+b)

(3x)^2 - 7^2 = (3x-7)(3x+7)

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Side note: This is the same as (3x+7)(3x-7). We can multiply two numbers in any order.

8 0
3 years ago
What is 1.7a+0.3a=4/5??? Halp me plz...
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<span>1.7a+0.3a=4/5
2a = 4/5
  a = 4/5 * 1/2
  a = 4/10
  a = 2/5</span>
6 0
3 years ago
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