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iragen [17]
3 years ago
15

Dakota has g gumballs. Regan has 15 fewer gumballs than Dakota. Choose the expression that shows how many gumballs Regan has.

Mathematics
2 answers:
butalik [34]3 years ago
4 0

Answer:

G - 15

-by-step explanation:

Tanya [424]3 years ago
3 0
G - 15



I hope this helps tbh idk
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A giraffe can run up to 46.93 ft. per second. How far could a giraffe run in 1.8 seconds? Justify your answer
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84.474 because 46.93(1.8) = 84.474
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If w = t and t = 9, what is the value of w?<br> –9<br> –1<br> 1<br> 9
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Answer:

9

Step-by-step explanation:

if t =9 and also t=w then w=9

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I need help What do you call the pair of angles in this diagram
Varvara68 [4.7K]

Answer: According to the pair of angles in the diagram, its B) Adjacent.

Step-by-step explanation:

-Adjacent angles are two angles that don't overlap each other and have a common side and a common vertex.

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3 years ago
USA Today reports that about 25% of all prison parolees become repeat offenders. Alice is a social worker whose job is to counse
pychu [463]

Answer:

a) P(X=0)=(4C0)(0.75)^0 (1-0.75)^{4-0}=0.0039  

P(X=1)=(4C1)(0.75)^1 (1-0.75)^{4-1}=0.0469  

P(X=2)=(4C2)(0.75)^2 (1-0.75)^{4-2}=0.211  

P(X=3)=(4C3)(0.75)^2 (1-0.75)^{4-3}=0.422  

P(X=4)=(4C4)(0.75)^2 (1-0.75)^{4-4}=0.316

b) E(X) = np = 4*0.75=3

c) Sd(X) =\sqrt{np(1-p)}=\sqrt{4*0.75*(1-0.75)}=0.866

d) P(X \geq 3) \geq 0.98

And the dsitribution that satisfy this is X\sim Binom(n=9,p=0.75

Step-by-step explanation:

Previous concepts

The binomial distribution is a "DISCRETE probability distribution that summarizes the probability that a value will take one of two independent values under a given set of parameters. The assumptions for the binomial distribution are that there is only one outcome for each trial, each trial has the same probability of success, and each trial is mutually exclusive, or independent of each other".

Let X the random variable of interest, on this case we now that:

X \sim Binom(n=4, p=1-0.25=0.75)

The probability mass function for the Binomial distribution is given as:

P(X)=(nCx)(p)^x (1-p)^{n-x}

Where (nCx) means combinatory and it's given by this formula:

nCx=\frac{n!}{(n-x)! x!}

Part a

P(X=0)=(4C0)(0.75)^0 (1-0.75)^{4-0}=0.0039  

P(X=1)=(4C1)(0.75)^1 (1-0.75)^{4-1}=0.0469  

P(X=2)=(4C2)(0.75)^2 (1-0.75)^{4-2}=0.211  

P(X=3)=(4C3)(0.75)^2 (1-0.75)^{4-3}=0.422  

P(X=4)=(4C4)(0.75)^2 (1-0.75)^{4-4}=0.316

Part b

The expected value is givn by:

E(X) = np = 4*0.75=3

Part c

For the standard deviation we have this:

Sd(X) =\sqrt{np(1-p)}=\sqrt{4*0.75*(1-0.75)}=0.866

Part d

For this case the sample size needs to be higher or equal to 9. Since we need a value such that:

P(X \geq 3) \geq 0.98

And the dsitribution that satisfy this is X\sim Binom(n=9,p=0.75

We can verify this using the following code:

"=1-BINOM.DIST(3,9,0.75,TRUE)" and we got 0.99 and the condition is satisfied.

4 0
3 years ago
How many fourth-fifths are in eight
Elenna [48]

Answer:

10

Step-by-step explanation:

8 ÷ 4/5 = 10

I hope this helps!!

7 0
2 years ago
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