So you will need to solve for x and y before evaluating 2x+y....
2x-y=9, y=2x-9 now this will make 4x^2-y^2=171 become:
4x^2-(2x-9)^2=171
4x^2-(4x^2-36x+81)=171
36x-81=171
36x=252
x=7, now we can use 2x-y=9 to solve for y...
2(7)-y=9
14-y=9
-y=-5
y=5
now we know that x=7 and y=5, 2x+y becomes:
2(7)+5
14+5
19
7x+7b = 7(x+b)
..............
Answer:
negative reciprocal
Step-by-step explanation:
Answer:
$ 7,098
Step-by-step explanation:
$2,590
+
$4,508
=
$7,098
The answer for the question is D!!
