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Brilliant_brown [7]
3 years ago
11

Prove that 3999991 is not prime

Mathematics
1 answer:
rodikova [14]3 years ago
7 0

3999991=4000000-9=2,000^2-3^2=(2000-3)(2000+3)=1997\cdot2003

As we can see, the number 3999991 can be expressed as a product of two numbers that are not 1 and the number 3999991 itself, therefore that number is not prime.

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Explain how you determine an equation for a line using a table of input/output values.
Lubov Fominskaja [6]
Example :

            x               y
            1               3
            2               6
            3               9
            4               12

first thing u do is pick any 2 points (x,y) from ur table

(1,3) and (2,6)
now we sub those into the slope formula (y2 - y1) / (x2 - x1) to find the slope
(y2 - y1) / (x2 - x1)
(1,3)....x1 = 1 and y1 = 3
(2,6)...x2 = 2 and y2 = 6
sub
slope = (6 - 3) / (2 - 1) = 3/1 = 3

now we use slope intercept formula y = mx + b
y = mx + b
slope(m) = 3
use any point off ur table...(1,3)...x = 1 and y = 3
now we sub and find b, the y int
3 = 3(1) + b
3 = 3 + b
3 - 3 = b
0 = b

so ur equation is : y = 3x + 0....which can be written as y = 3x...and if u sub any of ur points into this equation, they should make the equation true....if they dont, then it is not correct

and if u need it in standard form..
y = 3x
-3x + y = 0
3x - y = 0 ...this is standard form
6 0
3 years ago
Find c.round to the nearest tenth
alukav5142 [94]

Answer:

we need a picture...

Step-by-step explanation:

7 0
2 years ago
Brian compared the decimals 66.10, 21.10, and 66.11.
kogti [31]
Your answer is C hope this helps
3 0
3 years ago
39,012 in expanded form
Helen [10]
30,000 + 9,000 + 10 + 2
6 0
3 years ago
Does anybody know this? I appreciate any help. I ONLY need help with 6c.
elena55 [62]

40:68.6

Hoped it helps

8 0
3 years ago
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