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Algebra
The use of letters to substitute unknown numbers to form an equation. Solve the equation to get the unknown number using different methods such as simultaneous equations and more.
227,579 Questions
A circle does NOT have CUBIC FEET. A circle has an AREA and a CIRCUMFERENCE.
A Sphere has CUBIC FEET. A sphere has a VOLUME, SURFACE AREA, and a CIRCUMFERENCE.
The eq'n for the volume of a sphere is
V(Sphere) = (4/3) pi r^(3)
Out of the figures quoted in your question, which is the radius(r)?
How do you solve a linear equality with two unknowns?
Isolate one of the variable using inverse operations. Then solve.
Example: 2x + 4y = 0 --subtract 4y>> 2x = -4y --divide by -4>> -1/2x = y --plug in your variable -->>
What is the circumference of a circle with a 25ft diameter?
Use the equation
C = pi*d
Substitute
C = 3.14 * 25
C = 78.5 ft
NB This is only an approximate value, because '3.14' is only an approximate valuer for 'pi' , but convenient to use.
The other eq'n to use is
C = 2 pi r
Where 2r = d ( two radii equals one diameter ) . NB . 'radii' is the common noun plural of 'radius'. NOT 'radiuses'.
What is the ratio of the circumference of a circle to its diameter?
C = pi*d
The ratio is ALWAYS 'pi' for any circle, however, large or small.
pi is approximately 3.141592 , or 3.14, or 22/7
'pi' is an irrational number, which means the decimal digits go to infinity, AND the digits are NOT in any regular order.
There are infinitely many possible answers:1 * 20
0.1 * 200
0.001 * 2000 and so on.
or 2*10
0.2 * 100
0.02 * 1000
99,000,000,000
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3 and 9 is '39'
3 + 9 = 12.
NB Casually, 'and' would generally imply addition.
What is bigger five sevenths or four sixth?
5/7 & 4/6 => 5/7 & 2/3
To compare fractions, bring to a common denominator and equivalent numerators.
Hence
5(3)/7(3) & 2(7)/3(7)
Hence
15/21 & 14/21
Compare the numerators . 15 > 14
Hence
15/21 > 14/21 => 5/6 > 2/3 => 5/7> 4/6
NB When inspecting fractions, look to see if a fraction can be reduced. 4/6 = 2/3 .
Smaller numbers are easier to handle. !!!!!
15 + 5x
'5' is a factor of both '15' & '5' . So take '5' out!!!
Hence
5(3 + x)
What is the factor of q3-q2 plus 2q-2?
q^(3) + q^(2) + 2q + 2
=>
q^(2)(q + 1) + 2(q +1)
(q^(2)+ 2)(q + 1)
Fully factored.
To 'section' . However, if you mean two EQUAL parts, then it is 'BISECTION'.
0.4226 (not rounded) all you do is type in your number then press sin if you are doing these calculations on the computer but if you are on a calculator then you would press sin and then the number.
Just learned trig in my geometry class, its fun and easy.
Glad I could help out with this.
Thanks,
Kayla
What is the slope of the line that is perpendicular to the line whose equation is 2x - y equals 7?
-5
What does the math term Chance mean?
'Chance' is NOT used in mathemetical statistics.
The correct word is 'Probability'.
Algebraically expressed as
P( something occurring) = ( any decimal value between '0' and '1'.
P( ...) = 0 ( Will NOT happen)
P( ..._ = 1 ( Will definitely happen).
e.g. P( night follows day) = 1 ( It will definitely happen).
P( heads on coin toss) = 0.5 ( Because it may com down on the reverse side(tails)).
NB If you have a probability answer 'outside' '0' & '1', then the answer in incorrect.!!! Start again!!!!!
What does it means to triple the value of something?
'Triple' means to multiply by '3'
Another English language word for ' three times' is 'thrice'. However, this is largely an archaic word.
e.g.
To triple the number '4' means 4 x 3 = 12 ( 12 is the triple value)
Or ' thrice four' is twelve ( 12).
We also use the word ' twice' meaning , multiply by '2'. Or double a number.
e.g.
Twice four is eight(8), or 'double four is eight (8).
In the English language use the least number of words, to indicate an action.
e.g.
Two times , when they mean 'double' or 'twice'.
Three times , when they mean 'triple' 'thrice'.
'For sure' when they mean 'certainly'.
Putting more unnecessary words in to a statement is a silly bad American habit , that is now , unfortunately, used world wide.
How many inches are there in 70 meters?
In 70 M there are 70 X 100 = 7000 cm
1 inch = 2.54 cm (The conversion factor)
Hence divide7000 / 2.54 = 2755.9055... inches.
Divide by '12' for feet and inches.
2755.9055.. / 12 = 229 ft 7.9055... inches
Divide by '3' for yards ,feet, and inches.
76yards 1 foot 7.9055 inches.
What is x-a equals y-6 solve for a?
x - a = y -6
Subtract 'x' from both sides.
-a = y - 6 - x
Multiply both sides by ;-1;
a = -y + 6 + x Solved.
How can this be solved x² equals x?
x is equals to 0 or 1.
How is it solved? ....
x.x =x
x.x - x = 0 which can be solved by the usual formula for quadratic equations, or..
x.(x-1)=0
x= 0 or x-1 =0
x=0 or x=1
Factor the polynomial in quadratic form 6y6 - 5y3 - 4?
Let y^(3) = x
Hence y^(6) = x^(2)
Substitute
6x^(2) - 5x - 4
Factor
( 2x + 1)(3x - 4)
Substitute back
2y^(3) + 1 & 3y^(3) - 4
What is the sum of the interior angles measure of a 13-polygon?
EXT. ANGLE = 360/13 = 27.69...
INT. Angle = 180 - 27.69... = 152.31...
SUM of interior angles - 152.31... X 13 = 1980 degrees.
