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Two linear equations with a fraction 2019-04-26
From Asha:
2x=-3y Ö1
x-2+-4/3(y+1) ...2

note: Ö is equation

Answered by Harley Weston.
Constructing a hexagonal pyramid 2019-04-25
I'm doing a project for my Honors Geometry class and I have to build a regular hexagonal pyramid. I was given the volume of .75 gallons, but I don't know how to figure everything else out. Please help?

Answered by Harley Weston.
Three friend's ages 2019-04-25
From Lemicio:
Janet is 10 years older than Karin, who is twice the age of Josef. If their combine age is 55, how old is each one now?
Answered by Penny Nom.
80% of an item is $200.00 80% of an item is $200.00 2019-04-25
From kayla:
if 80% of a item is $200.00 what is the original price
Answered by Penny Nom.
Is every rectangle a rhombus? 2019-04-25
From Danny:
Is a rectangle a rhombus??? True or False
Answered by Penny Nom.
The area of a triangle 2019-04-25
From troy:
The base and the height of a right triangle are represented by the expressions below. The area of the triangle is 28 square units. Find the lengths of the base and the height of the triangle

base= x+4

Answered by Penny Nom.
(3d) Whether line segment intersects triangle 2019-04-13
From rj:
Well hello,

Lets say I have a triangle,

Not any ordinary triangle, but a triangle that is represented in 3 dimensions. I also have a line segment.

Lets say that this triangle has points A(0,0,0), B(1,0,0), C(0,1,1)

And the line segment has points D(0,1/2,0), E(1,1/2,1)

In what way can I find if the line segment and triangle intersect? Their intersection point?

I don't prefer matrices, because they don't make any sense, but ... if that's the only way to solve this, then do what's necessary.

Thank you in advance.

Answered by Penny Nom.
An equilateral triangle 2019-04-10
From ethan:
In equilateral triangle RST, R has coordinates (0, 0) and T has coordinates of (2a, 0). Find the coordinates of S in terms of a.
Answered by Penny Nom.
More on dominoes 2019-04-09
From B:
A previous answer (http://mathcentral.uregina.ca/QQ/database/QQ.09.00/mark2.html) considered a method to make a line of all 28 dominoes.

Since there are an even number of each value, such a solution can be put into a circle.

Aside from the choice of starting tile, is the solution unique?

Answered by Penny Nom.
The area of a lot 2019-04-06
From Robert:
Can you help me determine the rough square footage of this lot please(attached)? I think it is nearly 7000 square feet. I am sure I need the degrees of of the corners but I donít have that. An estimate would be all I need. Thank you for you help. Rob
Answered by Harley Weston.
The height of a building 2019-04-05
From Hayley:
A young man is 36 meters away from a building and looking at a bird sitting on top of the building. The man knows he is 85 meters away from the bird. How tall is the building?
Answered by Penny Nom.
4^x=2^x+6 2019-04-05
From Olivia:
How do you find the (b,n) if the solution of the equation 4^x=2^x+6 can be expressed at logb(n) where b and n are both prime numbers?
Answered by Penny Nom.
Salary Plus Commission 2019-04-05
From Herschel:
Fire Fighting Equipment pays salespeople as follows: $452 per week plus a commission of .9% on sales between $15,000 and $25000, with 1.1% paid on sales in excess of $25,000. Find the gross earnings for an salesperson whose Total Sales are $28,400. (No commission is paid on the first $15,000 of sales)
Answered by Penny Nom.
Percentage change in refractive error 2019-04-04
From Ammara:
Hi, I'm trying to figure out how a paper I'm looking at has found a percentage from the numbers below. its a paper comparing two lenses. it says that the new lenses 'slowed the progression of refractive error by approximately 50%'.

the refractive error with the old lenses was -2.26 after two years it was -3.28

the refractive error with the new lenses was -2.24 after two years the refractive error is - 2.75
Thank you so much for your help it is most appreciated!

Answered by Penny Nom.
Internal acute angles 2019-04-02
From karan:
Prove that a convex polygon cannot have more than three acute internal angles.
Answered by Penny Nom.



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