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Anastaziya [24]
3 years ago
9

Can someone help me with this? I'm getting a 0 in a) but the book has -1/5 answer. I'm confused.

Mathematics
1 answer:
jok3333 [9.3K]3 years ago
7 0
Replace the x values in the equation, then solve:

[(-2)^2+4]/[(-2)^2-2(-2)-48=

(4+4)/4+4-48=

8/8-48=

8/-40=

-1/5
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Answer:

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Step-by-step explanation:

1: Move 3.452 to the end of the equation

(3.452 × 100) -> (3.452 × 100 = 3.452)

2: Since 100 has 2 zeros, move the decimal point 2 places to the right.

(3.452 × 100 = 3.452) -> (345.2)

Hope this helps!

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Answer:

15 days

Step-by-step explanation:

Let x be the number of days needed for B to complete the job. Then x-5 is the number of days needed for A to complete the job.

In 1 day,

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\dfrac{6x+6x-30}{x(x-5)}=1,\\ \\12x-30=x^2-5x,\\ \\x^2-17x+30=0,\\ \\D=(-17)^2-4\cdot 30=289-120=169=13^2,\\ \\x_{1,2}=\dfrac{17\pm 13}{2}=2,\ 15.

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3 years ago
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Dahasolnce [82]
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Step-by-step explanation:

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