Answer:
The difference between combinations and permutations is that in permutations, the order matters, while it doesn't with combinations. For example, if you are given 5 numbers (1,2,3,4,5) and you have to determine how many 3 digit numbers you can make, that is a permutation question because 123, 231, 321, etc. are all different numbers. If, for example, we have to find how many ways three people can be chosen out of a group of 5, that is a combination question and you must use the combination formula as the order of the three people does not matter. Other than the order, combinations and permutations are the same
Answer:
B. 1
Step-by-step explanation:
The slope is calculated by taking the difference in the y-coordinates of two points and dividing that by the difference in the x-coordinates of those two points.
Here, we have (6, -12) and (15, -3).
The difference in the y-coordinates is:
15 - 6 = 9
The difference in the x-coordinates is:
-3 - (-12) = -3 + 12 = 9
Divide 9 by 9:
9/9 = 1
The slope is thus 1, and the answer is B.
Answer:
Step-by-step explanation:
Our sample space is the total number of cards in a deck, n(S)=52
Event A: Event that she chooses a three card
Number of 3 cards in a deck, n(A)=4
Event B: Event that she chooses a seven card.
Number of <u>7 cards</u> in a deck, n(B)=4
In Probability, P(A or B)=P(A)+P(B)
The probability that Zhi Qing chooses is either a three or a seven is 2/13.
PEMDAS: Parantheses first
Answer: B) Add 2 and 5.
Answer:
0.6t - 4.3s -2.6
Step-by-step explanation:
Given the expression
(-3.5t - 4s + 4.5) + (-7.1 - 0.3s + 4.1t)
Collect the like terms
= -3.5t+4.1t-4s-0.3s+4.5-7.1
= 0.6t - 4.3s -2.6
Hence the required expression is 0.6t - 4.3s -2.6
