All categories

3 years ago

13x12=[3x____]+[3x_]+[10 x]+[10x]

Mathematics

1 answer:

Ray Of Light [21]3 years ago

6 0

Answer:it's on the explanation

Step-by-step explanation:

3 x 1

10 x 5

10 x 9

You might be interested in

In a recent survey of 25 voters, 17 favor a new city regulation and 8 oppose it. What is the probability that in a random sample

Rasek [7]

Answer:

$P(X=2)=(6C2)(0.68)^2 (1-0.68)^{6-2}=0.0727$

Step-by-step explanation:

1) 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".

2) Solution to the problem

The probability in favor of the regulation based on the recent survey is:

$p = \frac{17}{25}=0.68$

Let X the random variable of interest "Number of favor respondents about the regulation", on this case we now that:

$X \sim Binom(n=6, p=0.68)$

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:

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

And we want to find this probability:

$P(X=2)=(6C2)(0.68)^2 (1-0.68)^{6-2}=0.0727$

If we use X= "Number of respondednts opposed to the regulation we got the same answer", but on this case p = 1-0.68=0.32, and we want this probability:

$P(X=4)=(6C4)(0.32)^4 (1-0.32)^{6-4}=0.0727$

6 0

3 years ago

Solve the system of equations.

Alenkasestr [34]

Step-by-step explanation:

Step 1: Substitute x from the second equation into the second one

$2x - 9y = 14$

$2(-6y + 7) - 9y = 14$

$(2 * -6y) + (2 * 7) - 9y = 14$

$-12y + 14 - 9y = 14$

$-21y +14 - 14 = 14 - 14$

$-21y/-21 = 0 / -21$

$y = 0$

Step 2: Substitute y into the second equation

$x = -6y + 7$

$x = -6(0) + 7$

$x = 0 + 7$

$x = 7$

Answer: $x = 7, y = 0$

4 0

3 years ago

Read 2 more answers

Increase 10cm by 20%

solniwko [45]

Answer:

12 cm

Step-by-step explanation:

multiply 10 by .2

10 × .2 = 2

add 2 to 10

2 + 10 = 12 cm

5 0

3 years ago

A(x-y) + b (x-y) factorize

Andre45 [30]

Answer:Given expression : a(x-y)-b(x-y)

Now, (x-y) is common in both terms.

First factor is (x-y).

∴a(x−y)−b(x−y)=(x−y)(a−b)

If you are reading this hope you have a wonderful day and may your dreams come true!

Good luck

4 0

3 years ago

A bakery offers a small circular cake with a diameter of 8 inches. It also offers a large circular cake with a diameter of 24 in

Elanso [62]

We must find the area of each cake's top.

Formula for area of a circle:

$A = \pi r^{2}$ where r is the radius.

small cake:
Plug in 4 for r because the radius is 4. (They give us the diameter, which is 8, and the radius is half that)

$A = \pi 4^{2}$

A = 16π

big cake:
Repeat the process:
Plug in 12 for r because the radius is 12. (They give us the diameter, which is 24, and the radius is half that)

$A = \pi 12^{2}$

A = 144π

So our two radii are 144π and 16π.
The large cake's top is not 3 times the area of the small cake's.

This makes sense because you are squaring the radius, which makes the fact that the larger cake's diameter is triple the smaller cake diameter irrelevant.

Hope this helped! ^-^

7 0

3 years ago

Read 2 more answers

13x12=[3x______]+[3x_____]+[10 x______]+[10x____]

13x12=[3x____]+[3x_]+[10 x]+[10x]