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2 years ago

1/2/1/4=h/1 hheeelpppppp

Mathematics

2 answers:

Alexxx [7]2 years ago

8 0

Answer:

Sort out which is which then divide or multiply

Step-by-step explanation:

solong [7]2 years ago

4 0

Jsjshjsbdbbsbshsbd. buuus s

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Explain how to estimate the product of 12 3/8 × 6 7/8

Gnesinka [82]

You can round each number to the nearest half

12 3/8 = 12 1/2

6 7/8 = 7

Now, you have: 12 ½ × 7

Since you have a mixed number, change it to a decimal to make it easier.

12 ½ = 12.5

12.5 × 7 = 87.5

The product of 12 3/8 and 6 7/8 is about 87 1/2 = 87.5

~Aamira~

Hope this helped :)

3 0

3 years ago

A multiple choice test is composed of 10 questions. Each question has four possible answers, only one of the four possible answe

kompoz [17]

Answer:

Let X the random variable of interest "Number of correct anwers on the tet", on this case we now that:

$X \sim Binom(n=10, p=0.25)$

And the expected value is given by:

$E(X) = np =10*0.25 = 2.5$

Step-by-step explanation:

Previous concepts

A Bernoulli trial is "a random experiment with exactly two possible outcomes, "success" and "failure", in which the probability of success is the same every time the experiment is conducted". And this experiment is a particular case of the binomial experiment.

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".

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 to the problem

Let X the random variable of interest "Number of correct anwers on the tet", on this case we now that:

$X \sim Binom(n=10, p=0.25)$

And the expected value is given by:

$E(X) = np =10*0.25 = 2.5$

4 0

2 years ago

A painter estimates she can paint a house in 40 hours. She knows her assistant can do the same job is 60 hours. How long would i

aleksley [76]

24 hours

Step-by-step explanation:

1 hour

Painter1 1/40

Painter2 1/60

together 1/40+1/60=5/120=1/24

6 0

2 years ago

Example The double number line shows the amount of clay Jamal uses to make different numbers of identical bowls. Is there a prop

8090 [49]

Answer:C: 2/3 B

Step-by-step explanation:

8 0

2 years ago

F the height of the parallelogram shown is decreased by 1 inch and the base is decreased by 2 inches, what is the area of the ne

TEA [102]

Answer:

The area of the new parallelogram is (bh - 2b - h + 2).

Step-by-step explanation:

The area of a parallelogram is:

$\text{Area}=\text{base}\times \text{height}$

Let the original base be denoted by, b and the original height be denoted by, h.

It is provided that the height of the parallelogram is decreased by 1 inch and the base is decreased by 2 inches.

The new base and height are:

b₁ = b - 1

h₁ = h - 2

The new area of the parallelogram is given by:

$\text{New Area}=b_{1}\times h_{1}\\\\=(b-1)(h-2)\\\\=bh-2b-h+2$

Thus, the area of the new parallelogram is (bh - 2b - h + 2).

4 0

2 years ago