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3 years ago

If x=3+2root2,find the value of xsquare+1/xsquare

Mathematics

1 answer:

shutvik [7]3 years ago

4 0

Answer:

34.

Step-by-step explanation:

x = 3 + 2√2

x^2 = (3+2√)^2

= 9 + 8 + 12√2

= 17 + 12√2

x^2 + 1 /x^2

= (17 + 12√2)^2 + (1 / (17 + 12√2)

= 34.

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The length of a rectangle is 5 meters greater than the width. The perimeter is 150 meters. Find the width AND the length.

oee [108]

Answer:

L=62.5 W=12.5

Step-by-step explanation:

L=5W

150=2W+2(5W)

75=W+5W

75=6W

W=12.5

12.5×5=62.5

62.5+62.5+12.5+12.5=150

7 0

3 years ago

Which graph best represents -5y = -6x + 15

frutty [35]

Answer: Option c.

Step-by-step explanation:

The equation of the line in Slope-Intercept form is:

$y=mx+b$

Where "m" is the slope and "b" is the y-intercept.

Given the equation:

$-5y = -6x + 15$

Solve for "y" in order to write in Slope-Intercept form:

$y = \frac{-6}{-5}x + \frac{15}{-5}\\\\y = \frac{6}{5}x -3$

Now you can identify that that the slope and the y-intercept are:

$m=\frac{6}{5}\\\\b=-3$

A posive slope means that the the line moves upward from left to right.

With this information, you can conclude that the the graph that best represents the given equation is the graph shown in the Option c.

3 0

3 years ago

A rectangle has a length of 42 inches and a width of 14 inches. Which of the following is not equal to the ratio of the rectangl

Temka [501]

The ratio of the rectangle's length to its width is 42/14 which simplifies to 3/1 by factoring out 14 out of the numerator and denominator.
Any ratio that is not 3:1, or a multiple of 3:1, is not equal.

List of Equal Ratios: 6:2, 9:3, 12:4, etc.

4 0

3 years ago

What is a ratio that compares two quantities measured in different units

Lisa [10]

A ratio that compares two quantities measured in different units is a conversion factor!

8 0

3 years ago

Please answer question 4

olasank [31]

#4)
cross multiply
2(8x+10) = 4 * 5x
16x + 20 = 20x
4x = 20
x = 5

3 0

3 years ago

If x=3+2root2,find the value of xsquare+1/xsquare​

If x=3+2root2,find the value of xsquare+1/xsquare