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3 years ago

M=7,r=8, t=2 ; mr/t = what

Mathematics

1 answer:

galina1969 [7]3 years ago

4 0

Answer:

Step-by-step explanation:

Plug in the corresponding numbers to the corresponding variables. Note that:

m = 7

r = 8

t = 2

mr/t = (7 * 8)/2

(7 * (8/2)) = 7 * 4 = 28

28 is your answer.

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Tkanks, but how you can use the distributive Property to find the numbet of books abouts animals in the bookstore.

Sedbober [7]

If you would tell me the whole problem I could answer it

3 0

3 years ago

A science test, which is worth 100 points, consists of 24 questions. Each question is worth either 3 points or 5 points. If x

cricket20 [7]

Answer:

The test contains 10 three-point questions and 14 five-point questions.

Step-by-step explanation:

x + y = 24

3x + 5y = 100

Try elimination.

-3x - 3y = - 72

2y = 28

y = 14

Then x = 10

So, we have 10 3-point problems and 14 5-point problems.

6 0

3 years ago

Lindsay is checking out books at the library, and she is primarily interested in mysteries and nonfiction. She has narrowed her

Ratling [72]

Answer:

0.0677 = 6.77% probability that they will all be nonfiction

Step-by-step explanation:

The books are chosen without replacement, which means that the hypergeometric distribution is used to solve this question.

Hypergeometric distribution:

The probability of x successes is given by the following formula:

$P(X = x) = h(x,N,n,k) = \frac{C_{k,x}*C_{N-k,n-x}}{C_{N,n}}$

In which:

x is the number of successes.

N is the size of the population.

n is the size of the sample.

k is the total number of desired outcomes.

Combinations formula:

$C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

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

In this question:

10 + 12 = 22 books.

She chooses 4 books, which means that $n = 4$

12 nonfiction, which meas that $k = 12$

What’s the probability that they will all be nonfiction?

This is P(X = 4). So

$P(X = x) = h(x,N,n,k) = \frac{C_{k,x}*C_{N-k,n-x}}{C_{N,n}}$

$P(X = 4) = h(4,22,4,12) = \frac{C_{12,4}*C_{10,0}}{C_{22,4}} = 0.0677$

0.0677 = 6.77% probability that they will all be nonfiction

7 0

2 years ago

(b) Expand (4 + x)½ up to the forth term using the binomial expansion

Serga [27]

Answer:

2±1\2x

Step-by-step explanation:

[4±x]1\2

we will start by opening the brackets

[4]1\2=2

[x]1\2=1\2x

2±1\2x

hope am right

4 0

3 years ago

Help pleaseee one of them is positive fractions and procedural fluency

navik [9.2K]

5) make the 5 a fraction (5/1) then use keep change flip to make the equation 5/1 * 10/3

That will give you 50/3, simplify that and you get 16 2/3

16 2/3 is your final answer

6) use keep change flip to make the equation 8/10 * 5/2

This will give you 40/20

Since 40 goes into twenty the answer is 2

2 is your final answer

3 0

1 year ago