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Last post please please help!! Algebra 2, 4 questions 

 

question #1

question #2

question #3

question #4

 Dec 16, 2018
 #1
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Question 1

 

.4 (.91)^2

 

The .4 means that .4 (100) = 40 pounds were originally in stock

The    .91 means that  the stock decreased by 9%  every hour

 

 

Question 2

 

This is an increasing exponential function

% change = [240 - 100]  = 140%

 

 

Question 3

 

Theta is in the third quadrant.....the sine and cosine are negative....so...tan > 0

 

cos (- theta)  =   -cos(theta)

 

And cos theta   =  [- sqrt [ 5^2 - 3^2] / 5   =  - sqrt (16)/ 5  =  -4/5

 

So

 

cos (-theta) = -cos(theta )   =  - (-4/5)   = 4/5

 

Question 4

 

tan  ( pi +  x)   =

 

sin (pi + x)             sin pi cos x  + cos pi sin x                        -sinx

_________   =       _________________________  =         ______ =    tan x   =   2/5

cos ( pi + x)            cos pi cos x  -  sin pi  sin x                     -cos x

 

 

cool cool cool

 Dec 16, 2018

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