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2 years ago

3xy + x = -29 Literal Equations! Solve for X. Show solution please! Thanks in advance!

Mathematics

1 answer:

frosja888 [35]2 years ago

4 0

3xy+x=-29
-3xy -3xy
x= -3xy-29

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2 years ago

Use the law of cosines to write an expression equivalent to b

andrezito [222]

Given:

A triangle ABC.

The given expression for b is:

$b=\sqrt{m+n-pq}$

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The expression that is equivalent to b.

Solution:

According to the Law of Cosines,

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$b=\sqrt{a^2+c^2-2ac\cos B}$ ...(i)

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2 years ago

Plz help me with this

Setler79 [48]

Answer: x = 8

(the correct answer was not provided as an option)

Step-by-step explanation:

$log_2(x-6)+log_2(x-4)=log_2(x)\\\\log_2[(x-6)(x-4)]=log_2(x)\\\\(x-6)(x-4)=x\\\\x^2-10x+24=x\\\\x^2-11x+24=0\\\\(x-3)(x-8)=0\\\\x=3\qquad x=8\\\\\\\text{The term after the log symbol (inside the parenthesis) must be greater than 0!}\\\\Check:\\3-6>0\ \text{FALSE --- so 3 is not a valid solution}\\\\8-6>0\ \text{TRUE}\\8-4>0\ \text{TRUE}\\8>0\ \text{TRUE --- 8 is a valid solution because it is true for all}$

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2 years ago