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2 years ago

Can someone help me with this please ?

Mathematics

1 answer:

rusak2 [61]2 years ago

8 0

38 , because since its 90 degrees at exact, your subtract 90 from 52 and you would get 38 for your x value

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In Leakwater township, there are two plumbers. On a particular day three Leakwater residents call village plumbers independently

Marianna [84]

Answer:

25% probability that all three residents will choose the same plumbe

Step-by-step explanation:

For each resident, there are only two possible outcomes. Either they choose the first plumbe, or they choose the second. The plumbers are chosen independent of each other. So we use the binomial probability distribution to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

In which $C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

And p is the probability of X happening.

Each resident randomly chooses one of the two plumbers.

This means that $p = \frac{1}{2} = 0.5$

Three residents:

This means that $n = 3$

What is the probability that all three residents will choose the same plumb

This is P(X = 0)(all choose the second pumble) or P(X = 3)(all choose the first pumble). So

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

$P(X = 0) = C_{3,0}.(0.5)^{0}.(0.5)^{3} = 0.125$

$P(X = 3) = C_{3,3}.(0.5)^{3}.(0.5)^{0} = 0.125$

$p = P(X = 0) + P(X = 3) = 2*0.125 = 0.25$

25% probability that all three residents will choose the same plumbe

4 0

2 years ago

A total of 140 seventh- and eighth-grade boys were asked which sport they preferred, basketball or baseball.

ss7ja [257]

Answer:

The answer is, " About 56% of those who prefer baseball are eight graders"

Step by Step Explanation:

Step 1: Turn 56% to a decimal, you get 0.56

Step 2: Multiply 0.56 by 68, the total amount of people who like baseball

Step 3 : you get 38.08 ( Don't mind the extra .08, just round )

Step 4 : You celebrate with a little victory dance!!!!!

7 0

2 years ago

Which is an equation in point slope form of the line that passes through the points (7, 5) and (-4, -1)

emmasim [6.3K]

Answer:

y = (6/11)x + 13/11

Step-by-step explanation:

y = mx + c

m = (-1-5)/(-4-7) = -6/-11 = 6/11

y = (6/11)x + c

When x = 7, y = 5

5 = (6/11)(7) + c

5 = 42/11 + c

c = 5 - 42/11

c = 13/11

y = (6/11)x + 13/11

11y = 6x + 13

5 0

2 years ago

Trevor is reading a book for a book report. Last week, he read 35 pages of his book. This week he read 2.5 times as many pages a

Svet_ta [14]

Answer:85.5

Step-by-step explanation:

Use calculator

3 0

3 years ago

Sound travels about 340 m / s. The function d(t) = 340t gives the distance d(t), in meters that sound travels in t seconds. How

Juliette [100K]

Answer:

d(63)=21,420m

Step-by-step explanation:

d(t)=340t

D=Distance

T=Time

D(63)=21,420

3 0

2 years ago