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4 years ago

Enter the missing numbers in the boxes to complete the table of equivalent ratios of lengths to widths.

Mathematics

1 answer:

borishaifa [10]4 years ago

4 0

So where's the rest of the question?

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River C is 500 miles longer than River D. If the sum of their lengths is 5,560 miles, what is the length of each river?

AleksAgata [21]

Answer:

River D: 2780 River C: 2280

Step-by-step explanation:

Please mark brainliest

8 0

3 years ago

A multiple choice exam has ten questions. Each question has five possible answers, of which one is correct. Suppose that a stude

Ber [7]

Answer:

8.81% probability that the student answers exactly 4 questions correctly

Step-by-step explanation:

For each question, there are only two possible outcomes. Either he answers it correctly, or he does not. The probability of answering a question correctly is independent of other questions. So we use the binomial probability distribution to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

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

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

And p is the probability of X happening.

A multiple choice exam has ten questions.

This means that $n = 10$

The probability of answering any question correctly is 0.20.

This means that $p = 0.2$

What is the probability that the student answers exactly 4 questions correctly

This is P(X = 4).

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

$P(X = 4) = C_{10,4}.(0.2)^{4}.(0.8)^{6} = 0.0881$

8.81% probability that the student answers exactly 4 questions correctly

4 0

4 years ago

X^2 -9 = -15 i got decimals please help me

olga nikolaevna [1]

Answer:

sqrt 24

Step-by-step explanation:

x^2-9=-15

x^2-9+9=-15+9

x^2=24

x=sqrt 24

4 0

3 years ago

Read 2 more answers

A rectangular pool has a length of 24 feet, a width of 12 feet, and a depth of 8 feet. What is the volume of the pool?

fenix001 [56]

Answer:

multiply opposite side and the answer is ready now because check your soulation

7 0

3 years ago

Yo does anyone know how to do this?

Sonbull [250]

Answer:

The horizontal line is the x-axis and the vertical line is the y-axis.

Step-by-step explanation:

The horizontal line is the x-axis and the vertical line is the y-axis. It's a fact. You can graph the lines by inserting the equations using the graphing calculator, which is the tab next to the one you have right now ;)

3 0

3 years ago