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dimulka [17.4K]
3 years ago
5

How do I solve this equation and check all the solutions?

Mathematics
2 answers:
mash [69]3 years ago
6 0

Answer:

10

Step-by-step explanation:

x-√2x-5=5

-√2x-5=5-x

√2x-5=-5+x

2x-5=x²-10x+25

2x-5-x²+10x-25=0

12x-20-x²=0

-x²+12x-20=0

x²-12x+20=0

x=10

Note: there is a another answer x=2 but the equality will be false if x=2 so the answer is 10

Eddi Din [679]3 years ago
5 0
The answer I got was: x = 0,2

Hope this helps! ;)
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A cell phone retailer used a mark-up rate of 60% on a cellphone case that originally cost $5. To find the new price of the case
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Answer:

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Step-by-step explanation:

5 increase 60% =

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KIM [24]

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Step-by-step explanation:

8 0
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Read 2 more answers
What is the value of y?
NNADVOKAT [17]

Answer:

y = 40

Step-by-step explanation:

Lets make an equation to represent the sum of the angles:

We know that the sum of angles of triangles equals 180 degrees. So based on this knowledge, the equation is :

2y + y + 10 + 50 = 180


Now we simplify:

2y + y = 3y


10 + 50 = 60


So our new equation is 3y + 60 = 180

Now all we have to do is simplify:

3y + 60 = 180

3y + 60 -60 = 180 - 60

3y = 120

3y / 3 = 120 / 3

y = 40


So the answer is 40 hope this helped


7 0
3 years ago
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Write the expression (2−3i)+5i(1−3i)<br> as a complex number in standard form.
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Answer:

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Step-by-step explanation:

Given

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= 2 + 2i + 15

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2 years ago
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