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Irina18 [472]
3 years ago
7

What numbers have a sum of 20 and the difference is 4

Mathematics
2 answers:
kvv77 [185]3 years ago
8 0

Answer:

<u>The</u><u> </u><u>numbers</u><u> </u><u>are</u><u> </u><u>1</u><u>2</u><u> </u><u>and</u><u> </u><u>8</u>

Step-by-step explanation:

let the numbers be x and y :

x + y = 20 -  -  - (a) \\ x - y = 4 -  -  - (b)

add (a) and (b):

2x + 0y = 24 \\ 2x = 24 \\ x = 12

find y:

x + y = 20 \\ 12 + y = 20 \\ y = 20 - 12 \\ y = 8

balu736 [363]3 years ago
6 0

Answer:

16 and 2

Step-by-step explanation:

I'm not sure honestly if this is correct, but I hope this helps.

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Then, answer Part B. A number cube that has sides numbered 1 through 6 is rolled 180 times. Part A How many times would you expe
Nitella [24]

Using the binomial distribution, it is found that the expected values are given by:

a) 120.

b) 150.

<h3>What is the binomial probability distribution?</h3>

It is the probability of <u>exactly x successes on n repeated trials, with p probability</u> of a success on each trial.

The expected value of the binomial distribution is:

E(X) = np

In this problem, for both items, we consider that the number cube is rolled 180 times, hence n = 180.

Item a:

4 of the 6 possible values are greater than 2, hence p = 4/6 = 2/3.

The expected value is given by:
E(X) = 180 x 2/3 = 120.

Item b:

5 of the 6 values are less than 6, hence p = 5/6.

The expected value is given by:
E(X) = 180 x 5/6 = 150.

More can be learned about the binomial distribution at brainly.com/question/24863377

4 0
2 years ago
There are infinitely How many pairs of numbers of which the sum of their cube roots is zero give two of these pairs
ivanzaharov [21]

Answer:

Infinite pairs of numbers

1 and -1

8 and -8

Step-by-step explanation:

Let x³ and y³ be any two real numbers. If the sum of their cube roots is zero, then the following must be true:

\sqrt[3]{x^3}+ \sqrt[3]{y^3}=0\\ \sqrt[3]{x^3}=- \sqrt[3]{y^3}\\x=-y

Therefore, any pair of numbers with same absolute value but different signs fit the description, which means that there are infinite pairs of possible numbers.

Examples: 1 and -1; 8 and -8; 27 and -27.

8 0
3 years ago
everyone's indiviaual demand for a particular good or service can be represented by the same demand curve
bija089 [108]

The statement "everyone's individual demand for a particular good or service can be represented by the same demand curve " is false. Option B

This is further explained below.

<h3>What is the demand curve?</h3>

Generally, In the field of economics, a demand curve is a graph that illustrates the relationship between the price of a particular commodity and the quantity of that commodity that is demanded at that price. Specifically, the graph shows how the quantity of a commodity is affected by the price of the commodity.

Demand curves may be used to analyze the price-quantity connection for a single customer, or they can be used to analyze the relationship for all consumers in a certain market.

In conclusion, It is a fallacy to assert that "everyone's individual need for a given commodity or service can be represented by the same demand curve."

Read more about Demand curves

brainly.com/question/13131242

#SPJ1

Complete Question

Everyone's indiviaual demand for a particular good or service can be represented by the same demand curve

True or false

5 0
1 year ago
Does the line y = 3x + 1 pass through the point (4,15)
Firdavs [7]
No. when the line reaches 4 on the x axis it is at 13 on the y axis.
3 0
2 years ago
Plz only do what i have not done
Gennadij [26K]

Answer:

7- B,A,C

8- J,A,L

9- D,E,F

10- C,D,E

11- B,A,C

12- X,Z,Y

I hope this helps!

8 0
2 years ago
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