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Mathematics

1 answer:

Tju [1.3M]2 years ago

7 0

Answer:

The answer would have to be B

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a leaf blower runs on a mixture of gas and oil. the ratio or ounces of gas to ounces of oil is 40 to 1. how many ounces of gas d

Helga [31]

Answer: 80 ounces

Step-by-step explanation:

40 : 1 = x : 2 where x = ounces of gas.

To get from 1 to 2, we multiplied by 2. So, we must also multiply 40 by 2 = 80.

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4 years ago

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Alika [10]

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What is the true solution to the equation below 2 log3(6x)-log3(4x)=2 log 3(x+2)

Tanya [424]

Answer: The answer is (C) C. x=1 and x=4.

Step-by-step explanation: We are given to find the true solution of the following equation involving logarithms:

$2\log_36x-\log_34x=2\log_3(x+2).$

We will be using the following properties of logarithms in the solution.

$(i)~a\log b=\log a^b,\\\\(ii)~\log a-\log b=\log\dfrac{a}{b}.$

The solution is as follows:

$2\log_36x-\log_34x=2\log_3(x+2)\\\\\Rightarrow \log_3(6x)^2-\log_34x=\log_3(x+2)^2\\\\\\\Rightarrow \log_3\dfrac{36x^2}{4x}=\log_3(x^2+4x+4)\\\\\\\Rightarrow 9x=x^2+4x+4\\\\\Rightarrow x^2-5x+4=0\\\\\Rightarrow (x-4)(x-1)=0\\\\\Rightarrow x-4=0,~~~x-1=0\\\\\Rightarrow x=4,~~~x=1.$

Since we can find the logarithm of a positive integer only, and both the solutions x = 1 and 4 satisfy this condition after substituting in the given equation, so both the solutions are TRUE.

Thus, the correct option is (C).

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irina [24]

Answer: At x = 2 the graph crosses the x-axis

Step-by-step explanation:

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3 years ago

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