Calculus

Possible the simplest math question ever.

-420 / 3 = -140.

So the numbers you need are -139 , -140 , -141.

An ordinary differential equation (ODE) has only derivatives of one variable.

Raymond F. X. Cahill has written:

'Study aid for economics' -- subject(s): Economics, Study and teaching

The answer will depend on whether the original function is 2/x9 or (2/x)9 but the difference is only in the coefficient.
In the first case the derivative is -18/x10 and in the second it is -4608/x10.

Does your book give an answer?

5 - 2X = - 2X + 3

5 = 3

is not a true statement. Ask your instructor.

Destrozado y sin control was created on 2010-05-07.

2a - 7 = -9

2a - 7 + 7 = -9 + 7

2a = -9 +7

2a = -2

2a/2 = -2/2

a = -2/2

a= -1

That should say 6x+6y=-24

A downward slope from left to right

x2 + 4x - 3 = 0

The quadratic formula is x = {-4 ± sqrt[(-4)2 - 4*1*(-3)]}/2

= {-4 ± sqrt[16 + 12]}/2

= {-4 ± sqrt[28]}/2

= {-4 ± 2*sqrt[7]}/2

= -2 ± sqrt[7]

you really don't know this?

Finding a limit is the process of allowing a variable to 'approach', or get very close to some numerical value and finding what effect this has on the function.

Ex: f(x) = (x2 -4)/(x-2)

if you attempt to find the value of the function when x =2, you will be attempting to divide by zero, which is undefined.

But find the limit and as x-->2 , f(x) --> 4

you can use x = 1.9 then x = 1.99, then x = 1.999 (approaching 2)

and f(1.9) = 3.9, f(1.99)=3.99, f(1.999) = 3.999

So you can see that the function is getting closer to 4

The Betz limit represents the maximum energy obtainable from a flowing fluid. This is a new topic for me, but Wikipedia has an entry under Betz' Law (don't forget the apostrophe after Betz) which may help you. This is a rather specialised topic and if Wikipedia does not give what you want you will probably have to consult a textbook on the subject.

A rectangle

plot 4y then 3x

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The well-written proof can be found in the Wikipedia article, which can be located in a link below.

There are 10 millimetres in one centimetre. Therefore, 400 centimetres is equal to 400 x 10 = 4000 millimetres.

No. There is insufficient information.

There are 10 mm in 1 cm so 550 cm is 5500 mm.

factorises as (2x + 1)(x + 1) so x = -0.5 or -1

Yes. This follows from the fact that pi is transcendental. That implies that it can't be written as a root.

Add 12 to each side: a = 36 + 12 = 48

84 * 2.2 / 14 = 13.2

This answer was calculated according to the order of operations.

Rule 1: First perform any calculations inside parentheses.

Rule 2: Next, from left to right, do all multiplications and divisions.

Rule 3: Last, from left to right, do all additions and subtractions.

Assuming the question actually means "How many cubic centimeters are in a cubic meter?", the answer would be 100x100x100= 1 million