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3 years ago

Could you solve it? I don't know how to solve it:(

Mathematics

1 answer:

Nikitich [7]3 years ago

5 0

Answer:

-1, 4

Step-by-step explanation:

$log_2x+ log_2(x-3)=2 \\ log_2 \{x(x-3) \}=2 \\ x(x - 3) = {2}^{2} \\ {x}^{2} - 3x = 4 \\ {x}^{2} - 3x - 4 = 0 \\ {x}^{2} - 4x + x - 4 = 0 \\ x(x - 4) + 1(x - 4) = 0 \\ (x - 4)(x + 1) = 0 \\ x - 4 = 0 \: \: or \: \: x + 1 = 0 \\ x = 4 \: \: or \: \: x = - 1 \\ \huge \red{ \boxed{x = \{ - 1, \: \: 4 \}}}$

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The worlds tallest house of

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Answer:

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2 years ago

What’s the rate of change of the table above? A) -1/3 B) 1/2 C) -1/4 D) 1/5

insens350 [35]

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2 years ago

4.89 is this a rational or a irrational

worty [1.4K]

Answer:

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Step-by-step explanation:

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3 years ago

Explain how place value could be used to find the difference between 4.23 into 2.75

Tomtit [17]

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3 years ago

Brooke has to set up 70 chairs in equal rows for the class talent show. But, there is not room for more then 20 rows. What are t

grin007 [14]

Answer:

The answer is 2, 5, 7, 10, and 14.

Step-by-step explanation:

Let x be the number of rows. There is not room for more than 20 rows:

x ≤ 20

Since all rows must be equal, when we divide 70 by x, we must get a whole number. So, we must find all divisors of 70 smaller or equal to 20 and they are: 2, 5, 7, 10, and 14.

So, the possibilities are:

2 rows with 35 chairs in each row

5 rows with 14 chairs in each row

7 rows with 10 chairs in each row

10 rows with 7 chairs in each row

14 rows with 5 chairs in each row

Hope this helps!!

~CoCo

7 0

3 years ago