Suppose and are vectors in 3-space. show that uxuxu = uxuxu=0

x> 6

step-by-step explanation:

8x+8> 7x+14

8x-7x> 14-8

x> 6

but which class are u may know that first

let x and 400 - x be the two numbers.  

==> 0.80x + 0.85(400 - x) = 400 - 68 from the statement of the problem.  

< ==> 0.80x + 0.85(400 - x) = 400 - 68  

==> 340 - 0.05x = 332  

< ==> -0.05x = -8 ==> x = 160, the first number ==> 400 - x = 240, the second number.