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Kaylis [27]
2 years ago
15

Please help i can't figure this problem out

Mathematics
1 answer:
densk [106]2 years ago
8 0

Answer:

there is a very good pdf that could help you with your math problems.

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Solving system by elimination<br> 7x+2y=24<br> 8x+2y=30
icang [17]
7x+2y=24
<span>-8x-2y=-30 (multiplied each side by -1)
-x = -6
x = 6

</span>7x+2y=24
7(6)+2y=24
42+2y=24
2y = -18
y = -9
8 0
3 years ago
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Factor completely 2x3 + x2 - 18x - 9
melisa1 [442]
Factor the following:
2 x^3 + x^2 - 18 x - 9

Factor terms by grouping. 2 x^3 + x^2 - 18 x - 9 = (2 x^3 + x^2) + (-18 x - 9) = x^2 (2 x + 1) - 9 (2 x + 1):
x^2 (2 x + 1) - 9 (2 x + 1)

Factor 2 x + 1 from x^2 (2 x + 1) - 9 (2 x + 1):
(2 x + 1) (x^2 - 9)

x^2 - 9 = x^2 - 3^2:
(2 x + 1) (x^2 - 3^2)

Factor the difference of two squares. x^2 - 3^2 = (x - 3) (x + 3):

Answer:  (x - 3) (x + 3) (2 x + 1) thus the Answer is C.
7 0
3 years ago
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The 32 oz can
Agata [3.3K]
30 I think not sure tho
6 0
2 years ago
I need help ASAP!! 13 points
OleMash [197]

Answer:

The correct answer is H

Step-by-step explanation:

1/4 of a wall in 2/3 of an hour is 40 min

so a wall takes 160 min which is 2 hours and 40 min

so 3 walls takes 8 hours

6 0
3 years ago
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Which expression can be used to find the value of the expression below -4(5 + (-2)​
guapka [62]

Answer:

-12

Step-by-step explanation:

-4(5+(-2))=-4(5-2)=-4(3)=-12

6 0
3 years ago
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