Answer:
a = 4/27 - b/54
Step-by-step explanation:
27a+1/2b=4
Subtract 1/2 b from each side
27a+1/2b - 1/2 b=4-1/2 b
27a = 4 - 1/2 b
Divide each side by 27
27a/27 = 4/27 - 1/2 b/27
a = 4/27 - b/54
B. The answer is b because -2m and -5m together equal -7m-8, and on the other side of the equal sign 3+-7+m equal -4+m
Here is how to solve it:
1) isolate x for x+y=2:
x=2-y
2)now plug this value in 3x^2-y^2=1
3(2-y)^2-y^2=1
simplify to get 2y^2-12y+11=0
and you get:

3)plug these(y1,y2) values in x+y=2
and you get:<span>

hope that i helped</span>
The answer is 150 because where line t and line s intersect is the same as the 30° angle so and the angle of a line is 180 so you would do 180-30 and that equals 150.
The answer is greater than