1answer.
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
FrozenT [24]
3 years 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:
photoshop1234 [79]3 years ago
4 0

Answer:

Davide's age is 10.

L'età di Davide è 10.

Step-by-step explanation:

The average age of Aldo, Bruno, Carlo and Davide is 16 years.

I am going to say that:

x is Aldo's age.

y is Bruno's age.

z is Carlo's age.

w is Davide's age.

Average of the 4 is 16 years.

This means that:

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

x + y + z + w = 64

If we do not consider Davide, the mean is 18. So

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

x + y + z = 54

Replacing in the first equation:

x + y + z + w = 64

54 + w = 64

w = 10

Davide's age is 10.

L'età di Davide è 10.

You might be interested in
Are used car was purchased for 7,800 one year later it was worth 6,400 what is the percentage depreciation
sashaice [31]

Answer:

Step-by-step explanatio 16%

7 0
3 years ago
What number + (−56)=12 <br> How do I do this?
Mars2501 [29]

Answer:

Step-by-step explanation:

x+(-56)=12

exclude "x"

x=56+12

x=68

7 0
2 years ago
Read 2 more answers
An artist agrees to paint a landscape painting at $0.30 per square inch. Formulas Show calculator Select the best answer If the
svlad2 [7]
First, you gotta multiply 13 by 17, which is 221, then multiply THAT by .3, which is 66.3. So the artist should charge $66.30
7 0
3 years ago
Help with number 1!! And also 1 week= 5 days in this exercise okay!
KatRina [158]
Each student collects $1 per week.
There are 24 students, so combined, they collect $24 per week.
The time irt takes to collect $1500 is

$1500/$24 = 62.5

Answer 62.5 weeks, or if you need a whole number, 63 weeks.
7 0
3 years ago
4 divided by the sum of a number and 12
Rasek [7]
4 /  (x+12)

since 4 is divided by the sum 4 would go first  ( as you see above) ^^
 
4÷(x+12)
7 0
3 years ago
Other questions:
  • A race car driver’s time in seconds to complete 12 laps is plotted on the graph. Why does the graph begin at x= 1?
    15·1 answer
  • A restaurant serves only tacos and enchiladas. If 60% of everyone who ate at the restaurant on a certain day ordered tacos, what
    13·1 answer
  • Hi friend. How many pounds are in 2.25 liters?
    11·2 answers
  • What percent of 65 of 13%?
    11·1 answer
  • Evaluate the expression if d = -3.<br><br> |d|<br> 3<br> 1<br> -3<br> 0
    11·2 answers
  • I NEED Help Please Help
    10·1 answer
  • Wing figures, solve for x. Complete parts (a) 80° 53​
    15·1 answer
  • A group of people were asked if they had run a red light in the last year. 385 responded "yes", and 472 responded "no".
    6·1 answer
  • |a| if a&gt;0<br> Please help!
    10·2 answers
  • Becky owns a business in an area that has an assessment rate of . The property tax rate is per . What is the effective tax rate?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!