Which statement describes the mapping? y -1 1 0 2 3 - 37 The mapping represents y as a function of x, because each y-value corresponds to exactly one x-valu B The mapping does not represent y as a function of x, because two of the x-values correspond to the y-value. © The mapping represents y as a function of x, because each x-value corresponds to exactly one y-valu 1024

14.3

step-by-step explanation:

add all the numbers together.

9 + 12 + 15 + 16 + 17 + 17 = 86

now, divide 86 by how many numbers we have: 6.

86 / 6 = 14.3

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.