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2 years ago

Someone help please haha

Mathematics

1 answer:

harkovskaia [24]2 years ago

8 0

Answer:

{-8, -7, 0, 6, 9}

Step-by-step explanation:

1. The range of a relation is the set of its possible output values, also known as the y-values of a function.

2. Let's find the y-coordinate of each point.

$9, 6, 0, -7, -8$

3. Now, let's order them (from least to greatest) to get the range.

$-8, -7, 0, 6, 9$
{-8, -7, 0, 6, 9}

Therefore, the range of this relation is {-8, -7, 0, 6, 9}.

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4 (x + 2.5) = 48<br> Explain your reasoning as well.

Travka [436]

Answer: 9.5 is the answer. You have to distribute through.

Explain: 4x+10=48

Subtract 10 from both sides you get 4x=38. Then divide both sides by 4 you get 9.5.

6 0

2 years ago

What is the probability of these events when we randomly select a permutation of {1,2, ..., n} where n≥4? a) 1 precedes 2 c) 1 i

Paraphin [41]

Answer:

a) 1/2

b) 1/n

c) 1/4

Step-by-step explanation:

a) For each permutation, either 1 precedes 2 or 2 precedes 1. For each permutation in which 1 precedes 2, we can swap 1 and 2 to obtain a permutation in which 2 preceds 1. Thus, half of the total permutations will involve in 1 preceding 2, hence, the probability for a permutation having 1 before 2 is 1/2.

c) If 2 is at the start of the permutation, then it is impossible for 1 to be before 2. If that is not the case, then 1 has a probability of 1/n-1 to be exactly in the position before 2. We can divide in 2 cases using the theorem of total probability,

P( 1 immediately preceds 2) = P (1 immediately precedes 2 | 2 is at position 1) * P(2 is at position 1) + P(1 immediately precedes 2 | 2 is not at position 1) * P(2 is not at position 1) = 0 * 1/n + (1/n-1)*(n-1/n) = 1/n.

d) We can divide the total of permutations in 4 different groups with equal cardinality:

Those in which n precedes 1 and n-1 precedes 2
those in which n precedes 1 and 2 precedes n-1
those in which 1 precedes n and n-1 precedes 2
those in which 1 precedes n and 2 precedes n-1

All this groups have equal cardinality because we can obtain any element from one group from another by making a permutations between 1 and n and/or 2 and n-1.

This means that the total amount of favourable cases (elements of the first group) are a quarter of the total, hence, the probability of the event is 1/4.

3 0

2 years ago

A piggy bank contains $5.45 in dimes and quarters. If the bank contains 29 coins, how many quarters are in the bank?

fredd [130]

There are 12 dimes in there
and 17 quaters

5 0

2 years ago

Read 2 more answers

mixer [17]

D i'm only typing this because it's gotta be 20 characters

6 0

3 years ago

Two weeks in a row, the golf course hosts a group of golfers. The second week had 10 more golfers than the first week. Use the d

Goryan [66]

Answer:

Step-by-step explanation:

week 1 - 62,68,68,68,69,70,70,72,72,75,75,76,78,78,80,80,80,89,89

week 2 - 62,68,68,68,69,70,70,72,72,72,75,75,76,78,78,80,80,80,85,86,86,86,88,88, 88,88,89,89,89,89

(bold = median)

week 2 median = 79 > week 1 median = 75

5 0

2 years ago

Read 2 more answers

Someone help please haha​

Someone help please haha