Open Question: Please help math urgent.?

interval notation is simple:
use round brackets for infinity and point that are not included (strictly greater or smaller)
use square bracket for points that are included (greater than or equal, less than or equal)
combine multiple intervals using union

x = -2 and x < 4
since -2 is included, and 4 is not we get
[-2,4)

x < -2 or x = 3
here -2 is not included but 3 is
(-infinity, -2)U[3,infinity)

-4 < a + 2 < 10
this is two inequalities, each should be solved separately
first we have:
-4or
a+2>-4
a>-4-2
a>-6
then we also have
a+2<10
a<10-2
a<8

so solution is
(-6,8)
because both -6 and 8 are not included.

last one is
x>=3
x>=6
to satisfy both, we use x>=6
which is
[6,infinity)

note that 6 was included (square bracket)

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Open Question: What is the formula to find center coordinates of a square?

let's say the vertex is A(0, 0)
and the length of side is 4

other points would be
B(4, 0)
C(4, 4)
D(0, 4)

the diagnonals are
BD: (4, 0) (0, 4)
and
AC: (0, 0) (4, 4)

midpoint of BD (E)

xE = (4 + 0) / 2
xE = 2

yE = (0 + 4) / 2
yE = 2

E(2, 2)

Midpoint of AC (E)
also equals
E(2, 2)

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Open Question: Potential zeros of polynomials?

Determine the maximum numbers of real zeros each polynomial can have. Then list the potential zeros.

1. 6x^4-x^2+2

2. -6x^3-x^2+x+10

Thanks!

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Open Question: Visual angle and image size on the retina?

Please tell me the formulas to figure out the answers for each of the problems so that I know how to do them:

Suppose that the focal length of the eye (the distance from the lens to the retina) is 2 cm. Your blind spot subtends an angle of roughly 5 deg. How big is the blind spot (in cm) on your retina? (Use the focal length as the distance in the visual angle equation).

The fovea is roughly 2 deg of visual angle. What is the diameter of the fovea in cm? (Use 2 cm again as the focal length).

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Open Question: use given zero to find the remaining zeros of the polynomial?

use given zero to find the remaining zeros of the polynomial?

g(x) = x^3 + 3x^2 + 25x + 75 Zero: -5i

if one zero is (- 5i), then (5i) is also a zero

(x + 5i)(x - 5i) = x^2 + 25

long division by (x^2 + 25) yields the quotient: (x + 3)

the remaining zero is: x = - 3

check

one problem at a time.

@ƒ

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Open Question: Where does h'(x) = 0.14 ?

Consider the graphs below. Both functions have a sharp corner at x=50.

m(x)
https://instruct.math.lsa.umich.edu/webwork2_course_files/ma115-042-f12/tmp/gif/kostakoe-3736-sethomework19prob12image1.png

n(x)
https://instruct.math.lsa.umich.edu/webwork2_course_files/ma115-042-f12/tmp/gif/kostakoe-3736-sethomework19prob12image2.png

Let h(x)=n(m(x)). Find a point x where h'(x)=0.14
x = ????

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Open Question: What coordinates satisfy this slope?

Technically, your question doesn't make any sense, since a coordinate cannot have a slope, only a line can.

The formula 'y=mx+b' describes a straight line, where 'm' is the slope, and 'b' is the y-intercept.

Any two lines with the same slope will be parallel to each other, so any line whose 'y=mx+b' formula has the same 'm' value and a different 'b' value will satisfy the requirements of your questions.

So, for instance:

y = 10x + 1 and y = 10x + 2 are the formulas for two parallel lines with a slope of 10.

To get coordinates on these lines, just plug in values for 'x' and solve for 'y'. For instance:

(0,1), (1,11), and (2,21) are on the line 'y = 10x + 1', and
(0,2), (1,12), and (2,22) are on the line 'y = 10x + 2'.

(:-o)

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Open Question: What data ranges can I create for this data, pic included?

http://www.flickr.com/photos/89180248@N07/8122574897/in/photostream

That's how my spread sheet in excel 2010 looks like and I need to create 7 data ranges for the column that says average dollar amount of each scholarship

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Open Question: Simple Ratio question help?

2/5 = x/45

5x = 90

x = 18 ANSWER

Sorry, I could not read the content fromt this page.

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Open Question: Volume of a cone. please help me!!!?

It is noticed that the height of a cone is twice its radius and that the cones volume is exactly 1000cm63. Calculate the dimensions of the cone correct to one decimal place.

please explain your answer thankyou

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