A)
The question tells us that
y + z = 180
And
y=3x+20
z=x
So we put them in the first formula:
y + z = 180
(3x + 20) + x = 180
Add and get x to one side:
4x + 20 = 180
4x + 20 - 20 = 180-20
4x = 160
Divide both sides by 4
x = 40
B)
Put x back in to equation to get size of each angle:
Y =3x +20
Y=3(40)+20
Y=120+20
Y=140
Z=x
Z=40
Verify: y+z=180
140+40=180
180=180
Answer:
The probability that the dogs are blue eyed and deaf is 13.02%.
Step-by-step explanation:
We are given the following information in the question:
P(Blue eyes) = 31%
P(Deaf) = 38%
P(Deaf | Blue eyes) = 42%
Formula for conditional probability:

Now, let A be the event where the dog is deaf and B be the the event where dog is blue eyed.

Hence, the probability that the dogs are blue eyed and deaf is 13.02%.
Answer:
the top one
Step-by-step explanation:
just look at the y intercept, and if it has (0,2) its right
and look also look at if it is going up from left to right or going down, beucase this has a negative slope it should be going down