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Andreyy89
3 years ago
13

Pls hurry it is 23 points i need help now Match the equation on the left with the correct estimate on the right. Each equation h

as been rounded to the
nearest ones place value.
22.78 - 14.12
23- 149
3.5-1.2
4-1=3
16.208 - 3.652
8-44
7.7-3.51
16-4-12

Mathematics
2 answers:
azamat3 years ago
6 0
It looks floppy but you said you need this fast so yeah

Aleksandr [31]3 years ago
6 0

Screenshot of answers.

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Use completing the square to determine which of the following gives the solutions to 3x2 - 24x + 40 = 28.
jeka94

Answer:

x=4+2\sqrt{3}

x=4-2\sqrt{3}

Step-by-step explanation:

<u>Completing the square</u>

when  ax^2+bx+c=0

Given equation:

3x^2-24x+40=28

Subtract 40 from both sides:

\implies 3x^2-24x=-12

Divide both sides by 3:

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Add the square of half the coefficient of x to both sides:

(\frac{b}{2})^2=(\frac{-8}{2})^2=16

\implies x^2-8x+16=-4+16

Factor the left side and simplify the right side:

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Square root both sides:

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Add 4 to both sides and simplify the radical:

\implies x=4\pm\sqrt{4 \cdot 3}

\implies x=4\pm\sqrt{4}\sqrt{3}

\implies x=4\pm2\sqrt{3}

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2 years ago
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Answer:

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Step-by-step explanation:

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3 years ago
A person weighing 170 lb burns 8.6 calories per minute while mowing a lawn. How many calories would be burned A person weighing
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Answer:

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Step-by-step explanation:

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