Well 13 /3 = 4.3333, that sure the cost for one book and the rate. so if he bought 12 books at the same rate, then its 12*4.33333. which equals 52 dollars
Answer:
3x-y=2
m1=-3/-1
m1=3
Since parallel, m1=m2 so,
m1=m2=3
The slope of straight line passing through the point (6,-1) is
y-(-1)=m2(x-6)
y+1=3(x-6)
Step-by-step explanation:
I don't say you have to mark my ans as brainliest but friend if it has helped you,plz don't forget to thank me....
(a) The probability of drawing a blue marble at random from a given box is the number of blue marbles divided by the total number of marbles. We assume that the probability of selecting one of two boxes at random is 1/2 for each box.
... P(blue) = P(blue | box1)·P(box1) + P(blue | box2)·P(box2) = (3/8)·(1/2) + (4/6)·(1/2)
... P(blue) = 25/48 . . . . probability the ball is blue
(b) P(box1 | blue) = P(blue & box1)/P(blue) = (P(blue | box1)·P(box1)/P(blue)
... = ((3/8)·(1/2))/(25/48)
... P(box1 | blue) = 9/25 . . . . probability a blue ball is from box 1
