So here we can find out that the two angles are vertical angles. That means that they have the same measure. So what we need to do is set them equal to each other:
2x+20=3x-30
x=50
The explanation is here. the rest of the questions must be do by yourself.
Distribute on the left
217+111x-185=-4
Combine like terms
111x+32=-4
Sybtract 32 from both sides
111x=-36
Divide both sides by 111
x= -36/111
x=-12/37
Final answer: x=-12/37
Answer:
the answer is

Step-by-step explanation:
the explanation is given in the image.
Answer:
18. C
19.A
20. C
Step-by-step explanation:
18.
x< 15 where x is the average that each person contributes.
This gives 3x <45, limiting the gift basket's total cost to < $45. (Actually ≤ 14.99 per person, so max cost is $44.97.
19. simple algebra
a <= -4 + 7
a <= 3
20.
since u divide and the co efficient is negative u flip the sign
-3m<15
m>-5