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3 years ago

Please help and explain it in easy steps!!!!

Mathematics

1 answer:

katrin [286]3 years ago

3 0

First of all, you have to change 4 1/2 into an improper fraction, so 9/2. Then, you just multiply the two together. 4/5 * 9/2 = 36/10 = 18/5 = 3 3/5. He can read 3 3/5 pages in 4 1/2 minutes.

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Hiiii i need help. Assume that a procedure yields a binomial distribution with a trial repeated n times. Use

kaheart [24]

Answer:

use the binomial probability formula to find the probability of x.

Step-by-step explanation:

8 0

3 years ago

Please Help I dont under stand please also do step by step thanks!

USPshnik [31]

Answer:

7x +1

Step-by-step explanation:

If A to C is 12x + 3, And A to B is 5x - 2 then you subtract the polynomials from each other!

12x- 5x = 7x

3 -2 = 1

So the answer is 7x +1!

(If you still need help just tell me in the comments)

4 0

3 years ago

Subtract (-4x - 2) - (13x + 1)

sp2606 [1]

Answer:

-17x-3

Step-by-step explanation:

Distribute the negative to the second part of the equation. remove the parenthesis from the first part and then add like values.

-4x-2-13x-1

-4x-13x-2-1

-17x-3

6 0

3 years ago

Write a numerical expression to represent the phrase. the difference of 4 cubed and 25

7nadin3 [17]

Hello!

First, "the difference" of 2 numbers means you subtract these numbers.

Then, 4 cubed is written as follows:

4³

Subtract:

4³-25

[If necessary] Evaluate:

64-25

Hope everything is clear.

Let me know if you have any questions!

Always remember: Knowledge is power!

3 0

2 years ago

A bag contains red marbles, white marbles, and blue marbles. Randomly choose two marbles, one at a time, and without replacement

dsp73

Answer:

$P(First\ White\ and\ Second\ Blue) = \frac{3}{28}$

$P(Same) = \frac{67}{210}$

Step-by-step explanation:

Given (Omitted from the question)

$Red = 7$

$White = 9$

$Blue = 5$

Solving (a): $P(First\ White\ and\ Second\ Blue)$

This is calculated using:

$P(First\ White\ and\ Second\ Blue) = P(White) * P(Blue)$

$P(First\ White\ and\ Second\ Blue) = \frac{n(White)}{Total} * \frac{n(Blue)}{Total - 1}$

We used Total - 1 because it is a probability without replacement

So, we have:

$P(First\ White\ and\ Second\ Blue) = \frac{9}{21} * \frac{5}{21 - 1}$

$P(First\ White\ and\ Second\ Blue) = \frac{9}{21} * \frac{5}{20}$

$P(First\ White\ and\ Second\ Blue) = \frac{9*5}{21*20}$

$P(First\ White\ and\ Second\ Blue) = \frac{45}{420}$

$P(First\ White\ and\ Second\ Blue) = \frac{3}{28}$

Solving (b) $P(Same)$

This is calculated as:

$P(Same) = P(First\ Blue\ and Second\ Blue)\$ $or\ P(First\ Red\ and Second\ Red)\ or\ P(First\ White\ and Second\ White)$

$P(Same) = (\frac{n(Blue)}{Total} * \frac{n(Blue)-1}{Total-1})+(\frac{n(Red)}{Total} * \frac{n(Red)-1}{Total-1})+(\frac{n(White)}{Total} * \frac{n(White)-1}{Total-1})$

$P(Same) = (\frac{5}{21} * \frac{4}{20})+(\frac{7}{21} * \frac{6}{20})+(\frac{9}{21} * \frac{8}{20})$

$P(Same) = \frac{20}{420}+\frac{42}{420} +\frac{72}{420}$

$P(Same) = \frac{20+42+72}{420}$

$P(Same) = \frac{134}{420}$

$P(Same) = \frac{67}{210}$

6 0

3 years ago