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antoniya [11.8K]
3 years ago
9

Solve for x, x^2-3x-5=0

Mathematics
1 answer:
Sophie [7]3 years ago
7 0

Okay so for this one, we have to isolate our X.Lets start by moving the negative 5 on the other side of the equal sign. Remember to not mix a number that is with an X with a normal number (in this case it would be the -3x and the -5). So in putting our -5 on the other sign it becomes positive. Here’s what we have: x^2-3x=5. x^2 is the same thing as 2x.So now you have to minus 3x off of your 2x. This gives us -1x, but can just be put as -x. So now we have -x=5. You’re answer could either be 5 or -5 if you decided to divide it by -1 seeing as your -x is technically -1.

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The width of a rectangular garden is 4.5 meters shorter than its length which is x meters.
Contact [7]

Answer:

  A.  width = x - 4.5

  B.  111 = 2(x + (x -4.5))

Step-by-step explanation:

A. The width is 4.5 meters shorter than x, so is x -4.5.

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B. The perimeter is twice the sum of length and width. It is 111 meters, so an equation for it could be ...

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4 0
3 years ago
I need to find x & y. plz answer i really need thisssss. only if correct :)
Leto [7]

Answer:

x=12, y= 20

Step-by-step explanation:

We can find x using the pythagorean thereom because ABD is a right triangle.(D is the point between segments with legnth 5 and 11)

AC^2 + CD^2 = AD^2

x^2 + 5^2 = 13^2

x^2 = 25 = 169

x^2 = 144

x = 12

We may now find y using the pythagorean thereom because ABC is a right triangle. Right now we know x = 12

AC^2 + CB ^2 = AB^2

12^2 + 16^2 = y^2

144 + 256 = y^2

y^2 = 400

y= 20

<em>I hope this helps! :)</em>

5 0
3 years ago
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Step-by-step explanation:

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If the standard deviation for a Poisson distribution is known to be 3.60, the expected value of that Poisson distribution is
Charra [1.4K]

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Step-by-step explanation:

given data:

Poisson distributio = 3.60

solution:

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which is expressed as = SD^2

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Newton's law!! ^^

Hope that helped

8 0
3 years ago
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