What are the coordinates for point a

(4,-2)

Step-by-step explanation:

We start at the origin ( where the axis cross).

Then we move 4 units to the right. (4)  That is the x coordinate

Then we move 2 units down (-2)  That is the y coordinate.

We write them in (x,y) form

(4,-2)

answer: it's d

step-by-step explanation:

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.