Answer:
See Annex for tree diagram and all probabilities
b) P(2y) = 0,329
Step-by-step explanation:
a) Attached
b) Probability of the second ball is yellow P(2y) is equal to the probability of the second ball is yellow given that the first one is black ( 0,204 ) plus the probability f the second ball is yellow given that the first one is yellow ( 0,125)
P(2y) = 0,204 + 0,125
P(2y) = 0,329
Answer: 6
Step-by-step explanation:
Let the number be x
If I increase twice my number by 5, the result is the same as if I triple my number and subtract 1. This can be formed into an equation as:
(2 × x) + 5 = (3 × x) - 1
2x + 5 = 3x - 1
5 + 1 = 3x - 2x
x = 6
The number you are thinking of is 6
Answer:
2
Step-by-step explanation:
y = 2x +7
so,
if x=0 then y =2 x 0 +7 =7
if x=1 then y =(2 x1) +7 =2+7=9
if x=2 then y =(2 x2)+7 = 4+7 =11
if x=3then y =(2 x3) +7 = 6+7 =13
if x=4 then y =(2 x4) +7 =8+7 =15
if x=5 then y =(2 x5) +7 = 10+7 =17
Answer:
greater than 2
less than 28
Step-by-step explanation:
The sum of the lengths of the two shortest sides must be more than the length of the longest side. If x is the shortest side, ...
... x + 13 > 15
... x > 2
If x is the longest side, ...
... 13 +15 > x
... x < 28
Then the allowed range for the third side is ...
... 2 < x < 28
