+0  
 
0
341
1
avatar

What is the value of x?  

x + 2/15 = x + 1/5.

 

 

A)x = 1/2

B)x = 10

C)x = -1/2

D)x = -10

 

 

 If s(x) = 2x^2 + 3x - 4, and t(x) = x + 4 then s(x) ยท t(x) =

 

 

A)2x^3 + 11x^2 + 8x - 16

B)2x^3 + 5x^2 + 16x - 16

C)3x^3 + 7x^2 + 8x + 16

D)3x^3 - 11x^2 + 16x + 16

 Aug 16, 2017
 #1
avatar+94558 
+1

(x + 2) / 15 =  (x + 1 ) / 5         cross-multiply

 

5 ( x + 2)  = 15 (x + 1)    simplify

 

5x + 10  = 15x  + 15       subtract 15, 5x from both sides

 

-5 = 10x                   divide both sides by 10

 

-5 / 10  = x  =  -1/2

 

 

 

 If s(x) = 2x^2 + 3x - 4, and t(x) = x + 4 

 

s(x) * t (x )  =       [ 2x^2 + 3x - 4 ]  [ x + 4 ]     =    [ 2x^3 + 3x^2 - 4x  + 8x^2 + 12x - 16 ]  =

 

 [ 2x^3 + 11x^2  + 8x  - 16 ]

 

 

 

cool cool cool                           

 Aug 16, 2017

10 Online Users

avatar
avatar
avatar
avatar

New Privacy Policy

We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive information about your use of our website.
For more information: our cookie policy and privacy policy.