answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Katena32
3 months ago
5

L'età media di Aldo, Bruno, Carlo e Davide è 16 anni. Se non si tiene conto di Davide, l'età media dei tre rimanenti sale a 18.

Qual è l'età di Davide? ​
Mathematics
1 answer:
AnnZ [12.3K]3 months ago
4 0

Answer:

Davide is 10 years old.

L'età di Davide è 10.

Step-by-step explanation:

The average ages of Aldo, Bruno, Carlo, and Davide amount to 16 years.

Let’s denote:

x for Aldo's age.

y for Bruno's age.

z for Carlo's age.

w for Davide's age.

The average for all four is 16 years.

This gives us:

16 = \frac{x + y + z + w}{4}

x + y + z + w = 64

Excluding Davide, the average age of the other three is 18. Therefore:

18 = \frac{x + y + z}{3}

x + y + z = 54

Substituting into the original equation:

x + y + z + w = 64

54 + w = 64

w = 10

Hence, Davide’s age is indeed 10.

L'età di Davide è 10.

You might be interested in
A follow-up study will be conducted with a sample of 20 people from the 300 people who responded yes (support) and no (do not su
PIT_PIT [12445]

Response:

Detailed explanation:

Hello!

Stratified sampling involves the categorization of the population into subgroups based on pre-established criteria for the study. These subgroups consist of homogeneous units concerning the relevant characteristics. In this instance, individuals in the groups will represent only one of the two potential opinions (support or not support) and not both.

The researcher determines the sample size desired, considering several factors such as finances, material availability, and accessibility to experimental subjects (for instance, if they are endangered species, larger sample sizes may not be feasible).

One might conduct proportionate stratified sampling by selecting a proportion of respondents who answered "yes" along with those who answered "no."

In this sampling method, taking a specific proportion from each subgroup allows for a more straightforward extrapolation of results to the overall populations. For example, if you needed a sample size of n = 20, each stratum would ideally contain half, meaning 10 from the “yes” group and 10 from the “no” group.

I hope this is helpful!

4 0
3 months ago
Fruit juice comes in two types of containers. The first is a rectangular prism that is 9 inches tall and has a rectangular base
babunello [11817]

The volume of a rectangular prism:

V_p=Bh\\\\B=wl\\\\w=2\ in;\ l=3\ in;\ h=9\ in

insert

V_p=2\cdot3\cdot9=54\ in^3

The volume of a cylinder:

V_c=\pi r^2h\\\\r=1.5\ in;\ h=8\ in

insert:

V_c=\pi\cdot(1.5)^2\cdot8=\pi\cdot2.25\cdot8=18\pi\ in^3\approx18\cdot3.14=56.52\ in^3

Response: C. The cylinder possesses a larger volume.

3 0
2 months ago
In a football tournament, the Bees scored 9 less than three times as many points as the Hornets. The Wasps scored 28 more points
Leona [12618]
B = bees, w = wasps, x = hornets

3x - 9 + w + x = 184
w = x + 28
(3x - 9) + (x + 28) + x = 184...combine similar terms
5x + 19 = 184
5x = 184 - 19
5x = 165
x = 165/5
x = 33 <== points scored by Hornets
5 0
2 months ago
Read 2 more answers
The projected worth (in millions of dollars) of a large company is modeled by the equation w = 206(1.1) t. The variable t repres
Zina [12379]

Answer:

Hello! The right expression is: w = 241(1.06)t

In this case, t denotes the years elapsed since 2000.

For the year 2001, t is calculated as 2001 - 2000 = 1

Substituting 1 into the equation gives us w = 241(1.06)¹ = 241 * 1.06 = 255.46

Thus, the value in 2001 amounts to 255.46.

Additionally, in the expression, 1.06 can be broken down as 1 + 0.06, where 0.06 signifies an annual growth rate of 6%.

Hope this is helpful!~ ♡

ItsNobody~ ☆

6 0
3 months ago
Other questions:
  • You are given that a wheel has a radius of 2 feet and a spin rate of 10 revolutions per minute. Describe how you would determine
    12·1 answer
  • Michael breeds chickens and ducks. Last month, he sold 505050 chickens and 303030 ducks for \$550$550dollar sign, 550. This mont
    12·1 answer
  • Explain how solving -7y &gt; 161 is different from solving 7y &gt; - 161
    13·2 answers
  • Suppose you have 20 coins that total $3.00. Some coins are nickels and some are quarters. Which of the following pairs of equati
    12·1 answer
  • Find the tangent ratio of angle Θ. Hint: Use the slash symbol ( / ) to represent the fraction bar, and enter the fraction with n
    7·1 answer
  • What is the total amount of sap trees produced that day? Please tell me ASAP(as soon as possible) because this lesson is due for
    13·2 answers
  • *NO 194 39% 13:08 Pilih jawaban yang paling tepat Segitiga PQR dan segitiga XYZ 5 poin merupakan dua segitiga yang kongruen. Bes
    15·1 answer
  • What is log Subscript 15 Baseline 2 cubed rewritten using the power property?
    15·2 answers
  • A student claims that 3x + 2y = 5xy. Use a visual representation to show whether this is true or false
    11·1 answer
  • Which answer does NOT correctly describe the graph of y = 5x + 12?
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!