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
Answer: (4a - 3b)2
Step-by-step explanation:it stays the same because there is no like terms
Answer:
-3 < x ≤ 6
Step-by-step explanation:
Left side is exclusive, right side is inclusive, hence the < and ≤, respectively.
Answer:
12 U.S teaspoons are in 1/4 cups.
The Formula is to multiply the volume value by 48.
So Since a 1/4 us cup=0.25 we can multiply this by 48.
0.25*48=12
So our awnser is 12 teaspoons
