Try 40x+20+4kxexponet2+4kx+k
0.00125 is your answer person
Step-by-step explanation:
<u>Step 1: Substitute x from the second equation into the second one</u>







<u>Step 2: Substitute y into the second equation</u>




Answer: 
x^2+3x-18 in factored form leaves us the two factors of;
(x+6)(x-3)
So from your choices (x-3) is the answer
Assuming the first part of this is "x squared" then just factor the trinomial by inspection