Answer:
123+b=180 (being sum of straight angle)
b=180-123
b=57
I am a little confused, if there any answer thingys? :/
Answer:
x = 14.4
Step-by-step explanation:
Similar means that the figures are proportional to each other. Because of this, we can form a problem. 
(the short side lengths) = 
(the long side lengths). Now we can solve this by cross-multiplying. If we multiply 9 · 8 we get 72, and 5 · x is 5x. 72 = 5x. Now divide both sides by 5. 72 ÷ 5 = 14.4. Therefore, x should be equal to 14.4. Does this make sense?
Answer:
3x+4y-12=0
y intercept = -constant term/coefficient. of y
= 12/4
=3
