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djyliett [7]
3 years ago
8

Can someone solve for x

Mathematics
1 answer:
Helen [10]3 years ago
6 0

bearing in mind that, whenever we have an absolute value expression, is in effect a piece-wise function with a positive and a negative version of the expression, so

\bf |x^2-4x-5|=7\implies \begin{cases} +(x^2-4x-5)=7\\\\ -(x^2-4x-5)=7 \end{cases} \\\\[-0.35em] ~\dotfill\\\\ +(x^2-4x-5)=7\implies x^2-4x-5=7\implies x^2-4x-12=0 \\\\\\ (x-6)(x+2)=0\implies x= \begin{cases} 6\\ -2 \end{cases} \\\\[-0.35em] ~\dotfill\\\\ -(x^2-4x-5)=7\implies x^2-4x-5=-7\implies x^2-4x+2=0 \\\\\\ (x-2)(x-2)=0\implies x = 2

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How do you do probability on numbers
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3 years ago
-0.4x-3.1=5.9 enter your answer as a decimal or as a mixed number in simplest form in the box
Katyanochek1 [597]

Answer:

x = -22.5

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6 0
3 years ago
The perimeter of a rectangle is 60 cm. The ratio of length to width is 3:2. Find the length and width of the rectangle.
kaheart [24]
Answer: L = 18 and W = 12

Explanation:

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8 0
4 years ago
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Hello, I need help with this. Giving brainiliest <br><br>9^(a) = (sqrt(3))^(a +2)​
Assoli18 [71]

Answer:

2/3

Step-by-step explanation:

Let's solve your equation step-by-step.

9a=(√3)a+2

9a=1.732051a+2

Solve Exponent.

9a=1.732051a+2

log(9a)=log(1.732051a+2)(Take log of both sides)

a*(log(9))=(a+2)*(log(1.732051))

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0.75a/0.75=0.5/0.75

(Divide both sides by 0.75)

a=0.666667

a=2/3

0.666667=2/3

Hope this helps :)

6 0
2 years ago
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