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3 years ago

Can anyone help me with this?

Mathematics

1 answer:

AleksandrR [38]3 years ago

8 0

Answer:

B.16 mins start from home to school or school to home

Step-by-step explanation:

I. When bike is faster than walk 3 times

Jane is in the middle of way to school

if she walk mid point to school is 4 mins

then mid point to home is 4 * 3 = 12 mins

School + Home = Total Mins

4 + 12 = 16

More discuss, leave comment below.

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Convert this franction into a percentage 9/12?

kolbaska11 [484]

Hello, Yoloalanis. In order to solve this question that you have just posted, you only have to do a few simple steps. So, We can do this!

Let's start with your fraction. You will first have to change 9/12 into a decimal. In order to do this, you will have to divide the numerator by the denominator. A numerator is also known as the top part of the fraction. A denominator is the bottom part of the fraction. So, when you divide nine by twelve, you get 0.75 as a decimal. Now, you just have to multiply the decimal by 100 or to make it simpler, just move the decimal two places to the right. To sum it all up, you will get 75%.

Hope it helps :)

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4 years ago

Read 2 more answers

Which division equation is shown by the area model?

Anton [14]

It would be c because ther is no 574, 110, or 9 in the area mosel. and in c all of the numbers ad up to 3,034.

3 0

3 years ago

About 11% of adult Americans are left-handed. Suppose that two people are randomly selected from this

marshall27 [118]

Answer:

a) $P(X=0)=(2C0)(0.11)^0 (1-0.11)^{2-0}=0.7921$

$P(X=1)=(2C1)(0.11)^1 (1-0.11)^{2-1}=0.1958$

$P(X=2)=(2C2)(0.11)^2 (1-0.11)^{2-2}=0.0121$

And then we have our probability distribution like this:

X | 0 | 1 | 2 |

P(X) | 0.7921 | 0.1958 | 0.0121|

b) $P(X \geq 1) = P(X=1)+P(X=2) = 0.1958+0.0121=0.2079$

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:

$X \sim Binom(n=20, p=0.48)$

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:

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

Solution for the problem

Part a

On this case since we select a sample size of n =2 we have the following values for the number of left handed X=0,1,2. We can find the probabilities for each case since we know that p=0.11.

$P(X=0)=(2C0)(0.11)^0 (1-0.11)^{2-0}=0.7921$

$P(X=1)=(2C1)(0.11)^1 (1-0.11)^{2-1}=0.1958$

$P(X=2)=(2C2)(0.11)^2 (1-0.11)^{2-2}=0.0121$

And then we have our probability distribution like this:

X | 0 | 1 | 2 |

P(X) | 0.7921 | 0.1958 | 0.0121|

Part b

For this case we want this probability:

$P(X \geq 1) = P(X=1)+P(X=2) = 0.1958+0.0121=0.2079$

8 0

3 years ago

Find the midpoint of points A(10,-7) and B(6, 1) graphically.

sashaice [31]

Answer:

(8,-3)

Step-by-step explanation:

Midpoint Formula: $(\frac{x^{1}+x^{2} }{2}, \frac{y^{1} +y^{2} }{{2} } )$

Plug in your numbers from the coordinates:

(10+6/2, -7+1/2)

(16/2, -6/2)

(8,-3)

4 0

2 years ago

In a certain region, about 11 ,000 people are needed to support a fire station. How many fire stations would you expect in a ci

Naya [18.7K]

Answer:

Step-by-step explanation:

There are an estimated 29,819 fire departments in the US Of these, 2,785 ... provided EMS service and advanced life support, and 11,559 (39%) of departments ... The authors would also like to thank the members of the NFPA staff who ... Figure 2 Number of Volunteer Firefighters and Rate per 1,000 Population. 4.

i hope this fact helps some

5 0

4 years ago