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Scilla [17]
3 years ago
7

Solve x2 – 8x = 3 by completing the square. Which is the solution set of the equation?

Mathematics
1 answer:
zhannawk [14.2K]3 years ago
5 0

Answer: {4 - V19, 4 + (19)

Step-by-step explanation:

(x)^2-2(x)(4)+(4)^2=(3)+(4)^2

(x+4)^2=3+16

(x-4)^2=19

taking under root

x-4=\sqrt{19\\

x=4±\sqrt{19}

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Dovator [93]
We know that they have:
2 entrences
3 ways to chose (escalator,elevator and stairs)
8 gates
and again 3 ways to chose (escalator, elevator and stairway)

now you have to multiply it:
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There are 144 different ways that Anita and Terry can go from street level to the trains:)
4 0
4 years ago
K=mv^2/2 solve for v
matrenka [14]

Answer: v=\sqrt[]{\frac{2K}{m} }

Step-by-step explanation:

K=\frac{mv^2}{2}

First, multiply by 2 to get rid of the 2 in the denominator. Remember that if you make any changes you have to make sure the equation keeps balanced, so do it on both sides as following;

2*K=\frac{mv^2}{2}*2

2K=mv^2

Divide by m to isolate v^2.

\frac{2K}{m}=\frac{mv^2}{m}

\frac{2K}{m} =v^2

To eliminate the square and isolate v, extract the square root.

\sqrt[]{\frac{2K}{m} }=\sqrt[]{v^2}

\sqrt[]{\frac{2K}{m} }=v

let's rewrite it in a way that v is in the left side.

v=\sqrt[]{\frac{2K}{m} }

4 0
3 years ago
John and Gary share a workload. At a certain point, John worked 2 more hours than Gary. The next day, John has worked 4 of Gary’
il63 [147K]
If these both men were working at normal hours, and then, (John) worked "2 more hours" than Gary has, this would just mean that he has worked more.

x+2= x+2.

Now if John has worked the double amount, 4 more times than Gary's usual hours, this would mean something quite different.

Then the expression would look like, (x+2×4x)

We don't know how many hours are the "usual hours", this is what "x" would then represent.

John has then worked (4×2+x) more hours than Gary.

Your answer: (4×2+x)
4 0
3 years ago
Water Tank A has a capacity of 550 gallons and is 66%<br> full. How much water is in Tank A?
vekshin1

Answer:

363

Step-by-step explanation:

Hope its right

8 0
3 years ago
Read 2 more answers
I need help please (geometry)
Galina-37 [17]

Answer:

Step-by-step explanation:

It is easy just: step 1: connect all dots then add your numbers up

4 0
3 years ago
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