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by buddy
Sun Aug 23, 2015 3:48 pm
Forum: Geometry
Topic: Need help with an Area question: "You are to build two separate enclosures..."
Replies: 1
Views: 32

Re: Need help with an Area question: "You are to build two separate enclosures..."

1. You have been given two lengths of fencing. 2. One is exactly 246.54918439354108 meters in length; the other is exactly 393.5680673801993 meters. 3. You are to build two separate enclosures - one enclosure for each of the lengths of fencing. 4. The area of each enclosure must be the maximum obta...
by buddy
Sun Aug 23, 2015 3:41 pm
Forum: Beginning Algebra
Topic: need help with this one: 627.552601=50.102x-x^2
Replies: 1
Views: 30

Re: need help with this one: 627.552601=50.102x-x^2

Do like they told you here: plug into the Quadratic Formula. What did you get when you did this? Please show all your work so we know where you're getting stuck. Thanx.
by buddy
Sun Aug 09, 2015 6:00 pm
Forum: Statistics
Topic: Confused about how to factor this
Replies: 1
Views: 137

Re: Confused about how to factor this

I'm reading something that contains the following line of maths, and I can't yet see how they make the leap to the second expression.... \mathbb{E}\left[\dfrac{q_1 R}{\bar{R}}\right]\, -\, q_1 \mathbb{E}\left[\dfrac{q_1 q_2 \left(R_1 \, -\, R_2 \right)}{\bar{R}}\right] Additional informatio...
by buddy
Wed Aug 05, 2015 10:50 pm
Forum: Beginning Algebra
Topic: Graphing a line given it's equation
Replies: 1
Views: 80

Re: Graphing a line given it's equation

Please help I have been trying to understand this since Saturday. y=3/4x then I have to draw a line and give three points :shock: The way you wrote this means like this: y\, =\, \dfrac{3}{4x} Did you maybe mean like this? y\, =\, \dfrac{3}{4}x If the 2nd one, try here to learn how to do the graph. ...
by buddy
Wed Aug 05, 2015 10:47 pm
Forum: Uncategorized
Topic: making cubes
Replies: 7
Views: 212

Re: making cubes

You have an unlimited supply of black, red and white unit (1x1x1) cubes. Use any 8 of these cubes to create different 2x2x2 cubes. What is the maximum number of these cubes that you can create? I get 27 as answer. Can anyone confirm? How are different 2-by-2-by-2 cubes defined as "different&qu...
by buddy
Sun Jul 12, 2015 4:38 pm
Forum: Trigonometry
Topic: Determining exact values for "Special trigonometric expressions"
Replies: 1
Views: 70

Re: Determining exact values for "Special trigonometric expressions"

Mainstrain wrote:2cos 45* x sin45*

i got this far, 2 square root3/2 x square root2/2 but am not sure what the next step is?

Multiply and simplify like you did back in algebra.
by buddy
Sun Jul 12, 2015 4:37 pm
Forum: Trigonometry
Topic: Reciprocal trigonometric ratios
Replies: 5
Views: 86

Re: Reciprocal trigonometric ratios

ok i did 1/tan(3.2404) and got 17 which is the correct answer, however when i went to the second problem i did 1/sin(1.2711)and got 45 You have a tan -1 key on your calculator but not a cot -1 . To find the inverse of the cotangent you have to convert to tangent form. Why are you converting the sin...
by buddy
Sun Jul 12, 2015 4:35 pm
Forum: Intermediate Algebra
Topic: Urgent problem, (simple?) linear programming,
Replies: 4
Views: 209

Re: Urgent problem, (simple?) linear programming,

What have you done so far?
by buddy
Fri Jul 10, 2015 12:35 pm
Forum: Advanced Algebra ("pre-calculus")
Topic: Geometric Sequences help
Replies: 2
Views: 217

Re: Geometric Sequences help

I feel like I'm spending an unnecessary amount of time guessing and checking for the common ratio. There isn't any guessing for common ratios. Just do the division and see if the answers match. Particularly when the majority of the numbers in the sequence are fractions. For example 27/64, 9/16, 3/4...
by buddy
Wed Jun 24, 2015 9:36 pm
Forum: Geometry
Topic: Need help with a sphere
Replies: 1
Views: 349

Re: Need help with a sphere

I have created a circle with points; this wasn't that hard. Now, I want to create a sphere using points. I'm not really sure what you're doing, but maybe spherical coordinated might help ( here ). You know the center and radius from the circle. Can you plug these into spherical coordinates to get t...

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