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A cubic equation |
2016-07-25 |
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Chinmay pose la question : x³-2x²-7x+5 Penny Nom lui répond. |
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The number of sides of a polygon |
2016-07-23 |
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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. |
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The temperature inside and outside a greenhouse |
2016-07-22 |
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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. |
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Two equations with fractions |
2016-07-22 |
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kanesh pose la question : p/2+q/3=3
p/4+2q/3=3 Penny Nom lui répond. |
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Which term of this sequence has value 8? |
2016-07-20 |
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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. |
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Writing numbers in the form a/b |
2016-07-17 |
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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. |
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A congruence theorem for two right angled triangles |
2016-07-17 |
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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. |
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The composition of a function with itself |
2016-07-17 |
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Mel pose la question : If f(1 + 3x) = 1 * x, solve f(f(x)) Penny Nom lui répond. |
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If x+y=7 and x^2+y^2=42, then xy equals? |
2016-07-17 |
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Mehzad pose la question : If x+y=7 and x^2+y^2=42, then xy equals? Penny Nom lui répond. |
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A train from Erie to New York |
2016-07-14 |
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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. |
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Lisa went for a run |
2016-07-14 |
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Olive pose la question : Lisa ran 3km north and then 4 km east what was her total distance Penny Nom lui répond. |
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The perimeter and area of a shape |
2016-06-30 |
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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. |
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A 1.4 acre square |
2016-06-28 |
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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. |
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Triakis |
2016-06-27 |
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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. |
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Slope |
2016-06-27 |
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Ashiq pose la question : What is 1% slope if length 101 feet? Penny Nom lui répond. |
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