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A cubic equation 2016-07-25
Chinmay pose la question :
x³-2x²-7x+5
Penny Nom lui répond.
The number of sides of a polygon 2016-07-23
Shriya pose la question :
All the angles of a polygon are either 155° or 140°.
There are twice as many angles of 155 °or 140°.
Find the number of sides of the polygon

Penny Nom lui répond.
The temperature inside and outside a greenhouse 2016-07-22
Mehzad pose la question :
Every day, the temperature in a greenhouse is at its low temperature, 70 degrees Fahrenheit, at 2 a.m. and at its high temperature, 84 degrees Fahrenheit, at 2pm. Its temperature increases linearly between 2 am and 2pm , and decreases linearly from 2 pm and to 2am. The outside temperature follows the same linear patterns, but has a low temperature of 60 degrees Fahrenheit at 2 am and a high temperature of 78 degrees Fahrenheit at 2 pm. At which of the following times will the temperature inside and outside the greenhouse be the same?

a) 8:00 am
b) 12:00 noon
c) 4:00 pm
d) The two temperatures will never be the same

Penny Nom lui répond.
Two equations with fractions 2016-07-22
kanesh pose la question :
p/2+q/3=3

p/4+2q/3=3

Penny Nom lui répond.
Which term of this sequence has value 8? 2016-07-20
Lauren pose la question :
Hi there

Which term in the sequence -2; -5/3; -4/3 ; -1; ... has a value of 8.

Since term 2 and 3 of this sequence contain fractions which can be converted to recurring decimals. What is the best way to work out the common difference here.

I do however understand that to work out the nth term of an arithmetic series, the following formula Tn = a + (n-1)d. In this series a = -2

Penny Nom lui répond.
Writing numbers in the form a/b 2016-07-17
Edward pose la question :
How to write these numbers in form of a/b: -7, 0.175, -3.25, 37/10, -16, 1/3, 2.04
Penny Nom lui répond.
A congruence theorem for two right angled triangles 2016-07-17
Sayari pose la question :
Hello. Is it possible for two right angled triangles to have the same length of base and height and a different hypotenuse? If not so, then why in the congruence criteria RHS the hypotenuse is given more importance? It can also be like- 'two triangles are congruent if they are right angled and have the same base and height.' Thank You.
Penny Nom lui répond.
The composition of a function with itself 2016-07-17
Mel pose la question :
If f(1 + 3x) = 1 * x, solve f(f(x))
Penny Nom lui répond.
If x+y=7 and x^2+y^2=42, then xy equals? 2016-07-17
Mehzad pose la question :
If x+y=7 and x^2+y^2=42, then xy equals?
Penny Nom lui répond.
A train from Erie to New York 2016-07-14
carol pose la question :
a train leaves Erie with twice as many women as men. At York, 17 men get on and 16 women . How many men and women were originally on the train?off. There are now the same number of men as women
Penny Nom lui répond.
Lisa went for a run 2016-07-14
Olive pose la question :
Lisa ran 3km north and then 4 km east what was her total distance
Penny Nom lui répond.
The perimeter and area of a shape 2016-06-30
Scott pose la question :
If I have a 16 x 32 rectangle the square feet is 512. So if I take a rope 96 feet long , which is the lineal feet of the rectangle, and manipulate it to any shape I want does the square footage inside the rope stay at 512 square feet? Thanks in advance!
Penny Nom lui répond.
A 1.4 acre square 2016-06-28
Jamie pose la question :
Dear Faithfullness,

I was previously to be purchasing a square 1 acre plot, which I believe was to have 209feet, 4 sides perimeter.

How big would a 1.4 acre site be?
In sq feet length ie original 209ft + (the adeed 0.4)

Penny Nom lui répond.
Triakis 2016-06-27
Gordon pose la question :
Some authorities treat "triakis" (and related terms "dyakis", "tetrakis", etc.) as attached prefixes; others treat them as separate adjectives. Thus I see one of the Catalan solids described as both "triakistetrahedron" and "triakis tetrahedron". Which usage is correct?
Chris Fisher lui répond.
Slope 2016-06-27
Ashiq pose la question :
What is 1% slope if length 101 feet?
Penny Nom lui répond.
 
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