CPhill

1/12 + 1/50

Here's an easy way to do this (we'll have to reduce at the end)

Cross-multiply the 50 in one denominator with the 1 in the other numerator. Then do the same with the 12 in the other denominator with the 1 in the other numerator. Then, add these two results

So we have   50*1  + 12*1 = 62

Now, put this result over the product of the denominators = 12*50 = 600

So we have

62/600   reduce this by dividing the numerator and the denominator by 2......this gives us...  31/300 .....and there's your answer !!!

Cot = 1/Tan

So

Cot = 1 /11.2 = about 5/56 = about .089

Very nice, Alan......this explanation makes total sense........

-0.3 is larger than -10.7  because it's closer to 0 on the number line. Thus, -0.3 isn't as negative as -10.7.

6B²C-12B²C³+3B³C² =

Take out the greatest common factor first (3B²C)

(3B²C)(2 - 4C² + BC )

So...the answer is "C"

Well....I do have a degree in "Advanced Martian"............

HAHAHA !!!....I wish it were true, Rosala...unfortunately, I just know a little bit about almost nothing !!!!

P= QV/HE 

Multiply both sides by HE

HEP = QV  

Divide both sides by V

HEP/V = Q

Note, when x = 0, a^(0) = 1

So, the point that all graphs of the form y = a^x have in common is (0, 1).

And using the same logic, the point that all graphs of the form  y = 2a^x have in common is (0, 2).

(B+.6) (B-.5)

Using "FOIL" .........

Multiplying the first terms together, we have B*B = B^2

Multiplting the outer terms together, we have  - .5*B = - .5B

And doing the same with the inner terms, we have   .6*B = .6B

And multiplting the last terms together, we have .6*-.5 = -.30

And adding all of these we have

B^2 - .5B + .6B - .30 =

B^2 + .1B - .30