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: x intercepts -4,0 6,0 vertex:1,-25
Step-by-step explanation:
There are 6 children that ate 9 cookies what is the ratio of the children and cookies?
Hope this helps!
Answer:
out of the entire piece 160/200 is shaded, after simplifying it should be 4/5
Step-by-step explanation:
count the total, in this case 200 blocks
then count the shaded area, 160
160/200 --> after simplifying --> 4/5
