Remember
ou can do anything to an equaiotn as long as you do it to both sides
try to isolate variable and get 1 of it
-6+5b=6b-7
subtract 5b from both sides
-6=b-7
add 7
1=b
X + k y = 1
k x + y = 1 / * ( - k )
----------------
x + k y = 1
- k² x - k y = - k
--------------------
x - k² x = 1 - k
x ( 1 - k² ) = 1 - k
x = ( 1 - k ) / ( 1 - k² ) = ( 1 - k ) / ( 1 - k ) ( 1 + k )
y = 1 - k( 1 - k )/( 1 - k² )
y = ( 1 - k ) / ( 1 - k² ) = ( 1 - k ) / ( 1 - k ) ( 1 + k )
a ) For k = - 1 this system has no solution.
b ) For k ≠ - 1 and k ≠ 1, the system has unique solution:
( x , y ) = ( 1/ (1 + k) , 1/( 1 + k ) ).
c ) For k = 1, there are infinitely many solutions.
I think $6.75 for 15 juice boxes is better because, each juice box is 0.45.
While $5.50 for 11 juice boxes is 0.50.
And if we were to add 0.50 enough times to make 15 juice boxes it would equal 7.50
RIP OFFFFFFF
THE SECOND ONE IS A WAY BETTER OF A DEAL
Answer:
√20,
√19,
√17,
√23
Step-by-step explanation:
