maphWea. org/glow#/test-player Kayla made the graph of the linear system x + y = 1 2x - 3y = -18 V 9 1 -9-8-7-6-5-4-3-2-1. 1 3 4 5 6 7 8 9 X مینا نود -9 What is the solution to the linear system? O A. (-9,6) OD. (1,6) OB. (-9,1) O E. (4, -3) Oc. (-3, 4)​

step-by-step explanation:

we have

using a graphing tool

see the attached figure

this is a quadratic equation (vertical parabola) open up

the vertex is a > vertex

the domain of the function is all real > interval (-∞,∞)

the range of the function is the > [-6.125,∞)

the function has two x->   and

the function is increasing over the > (0.25,∞)

the function is decreasing over the > (-∞,0.25)

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.

b.

step-by-step explanation:

i just know