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skelet666 [1.2K]
3 years ago
13

I need someone to factor this and show me the steps

Mathematics
2 answers:
Volgvan3 years ago
6 0
This can be factored out with the form: (ax+by)^2 = a^2x^2 + 2abxy + b^2y^2

So by comparison, you will have 3 equations:

a^2 = 10   2ab = 17   b^2 = 3

You will notice that these 3 equations cannot be satisfied at the same time, which means it cannot be factored out perfectly

So, you can only satisfy two of them, and compromise the 3rd one.

Let's say I want to use the first and the last one, i.e. a = sqrt(10) and b = sqrt(3)

Then, (sqrt(10)x + sqrt(3)y)^2 = 10x^2 + 2sqrt(30)xy + 3y^2

But you need 17xy in the question.

So your final answer will be (sqrt(10)x + sqrt(3)y)^2 + (17xy - 2sqrt(30)xy)

You can use another 2 pairs and get different forms too.
ikadub [295]3 years ago
4 0
10x^2 + 17xy + 3y^2 = (2x + 3y)(5x + y)

hope it helps
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1 MINUTE!!!
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Answer:

About 9.38

Step-by-step explanation:

Since the \sqrt{88} is between the \sqrt{81} and the \sqrt{100} which simplified is 9 and 10, you just need to guess and check. Eventually you'll get about 9.38 (I used Google cause I was lazy) And if it isn't between the numbers 9 & 10, it's wrong.

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3 years ago
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Draw a number line and mark all described points. 5x<12
attashe74 [19]

Answer:

x < 2.4

Step-by-step explanation:

5x < 12

x < 12/5

x < 2.4

On the number line, draw an arrow going towards left from 2.4, with an open circle at 2.4

7 0
3 years ago
. Write three numbers that round to<br> 38,000 when rounded to the nearest<br> thousand.
stiks02 [169]

Answer:

37999, 38100, 38300

Step-by-step explanation:

37999

38100

38300

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3 years ago
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The variables x and y have a quadratic relationship. Tripling the value of x causes the value of y to increase by a factor of ni
Lady bird [3.3K]

Answer:

<em>The value of y when x has a value of 9 is 18</em>

Step-by-step explanation:

<u>Functions</u>

The variables x and y are said to have a quadratic relationship. That information is not enough to set up a general equation for both variables.

Furthermore, we know that tripling the value of x causes the value of y to be multiplied by 9. That leads us to establish a proportional equation between them, as follows:

y=kx^2

Where k is an unknown constant.

Let's use the given point (3,2) to find the value of k:

2=k(3)^2

2=9k

Solving for k:

\displaystyle k=\frac{2}{9}

The equation is now:

\displaystyle y=\frac{2}{9}x^2

Now find y when x=9:

\displaystyle y=\frac{2}{9}(9)^2

\displaystyle y=\frac{2}{9}\cdot 81=18

The value of y when x has a value of 9 is 18

3 0
3 years ago
You need to construct an open-top rectangular box with a square base that must hold a volume of exactly 475 cm3. The material fo
zepelin [54]

Answer:

The dimensions of the box are:

x =  8,93 cm       and     h  =   5,95 cm

C(min) =  850,69 cents

Step-by-step explanation:

The volume of the box is:

V = x²*h          where    x is the side of the square base  and h the height

then    h  =  V/ x²  ⇒    h = 475 / x²

The total cost of box C is:

C  = C₁  +  4*C₂      Where C₁  and C₂  are the costs of the base and one lateral side respectevily

Then cost C =  8*x²   + 4* 6*h*x

The cost C as a function of x is

C(x)  =  8*x²  + (24* 475 /x² )*x

C(x)  =  8*x²  +  11400/x

Tacking derivatives on both sides of the equation

C´(x)  =  16*x -  11400/x²

C´(x)  =  0     ⇒    16*x  -  11400/x²  = 0

16*x³  =  11400     ⇒   x³  =  11400/16

x³ =  712,5

x  =  8,93  cm

and    h   =  475 / (8,93)²      ⇒      h  =  5,95  cm

C(min)  =  8*79,77  +  4* ( 8,93)*5,95

C(min)  =  638,16  +  212,53

C(min)  =  850,69 cents

To check if value x = 8,93 would make C(x) minimum we go to the second derivatives

C´´(x) =  16  +  22800/x³ > 0

Then we have a minimum of C at  x = 8,93

4 0
3 years ago
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