We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive pseudonymised information about your use of our website. cookie policy and privacy policy.
 
+0  
 
0
144
3
avatar+397 

deleted.

 Jun 13, 2019
edited by sinclairdragon428  Nov 20, 2019
 #1
avatar+104962 
+2

1.   4x + ay  = -8  (1)

      2x + y  = b           multiply through by 2  ⇒  4x + 2y = 2b     (2)

 

This will have infinite solutions  when (1) and (2) are the same

So    a  = 2

And  -8 = 2b  ⇒  b = -4

 

So  (a, b)  =  ( 2, - 4)

 

 

cool cool cool

 Jun 13, 2019
 #2
avatar+104962 
+2

2. What is the y-intercept of the line x-2y=5?

 

The y intercept occurs where x = 0......so....

 

(0) - 2y = 5

-2y = 5        divide both sides by  -2

y = -5/2   = the y intercept

 

cool cool cool

 Jun 13, 2019
 #3
avatar+104962 
+2

 

3.Find the value of n that satisfies   \(\frac{1}{n+1} + \frac{2}{n+1} + \frac{n}{n+1} = 3\)

 

[ 1 + 2 + n ]

__________   =    3                   multiply through by n + 1

     n + 1 

 

3 + n  =  3n + 3      subtract n, 3 from both sides

 

0 = 2n   

 

n = 0

 

cool cool cool

 Jun 13, 2019

8 Online Users

avatar