9x – 3y – 5x + 7y + x + y
9x-5x+x -3y+7y+y
x(9-5+1) +y(-3+7+1)
5x+5y
Choice C
Answer: 40 degrees
Step-by-step explanation:
The 3 angles of a triangle must add up to 180 degrees.
Let's say this is triangle ABC and angle A has a measure of 100 degrees.
That leaves 80 degrees to be split evenly between angles B and C.
80/2 = 40, so angles B and C must each be 40 degrees.
Answer is 1/16 because if you look at 4, we can toss it 16 times by arranging in a different way .
A) Suppose

is the set of juniors and

is the set of social science majors. There are 35 students in all, but 12 of them don't belong to either set, so

. Then

So the probability that a random student is both a junior and social science major is

b) We're looking for the probability

. By definition, this would be