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
borishaifa [10]
3 years ago
6

I’m stuck, please give the explanation for the first question.

Mathematics
2 answers:
gladu [14]3 years ago
6 0
----------------------------------------------
Define x:
----------------------------------------------
Let x be the number of students in the second class:
⇒second class = x

There are 3 more students in the first class than in the second class:
⇒first class = x + 3

There are 2 more students in the third class than in the second class:
⇒third class = x + 2

----------------------------------------------
Expression for each class:
----------------------------------------------
First class = x + 3
Second class = x
Third class = x + 2

----------------------------------------------
Expression for total number of students:
----------------------------------------------
Total = x + 3 + x + x + 2
Total =  3x + 5

----------------------------------------------
Find x:
----------------------------------------------
There are 80 students in total, so
3x + 5 = 80
3x = 75
x = 25

----------------------------------------------
Find the number of students in each class:
----------------------------------------------
First class = x + 3 = 25 + 3 = 28
Second class = x = 25
Third class = x + 2 = 25 + 2 = 27

--------------------------------------------------------------------------------------------
Answer: There are 25 students in the second class.
--------------------------------------------------------------------------------------------
Tcecarenko [31]3 years ago
5 0
You should write equation for this
if we put x as the number of students in the second class then the equation will be :
(3 + x) + x(2 + x) = 80 \\ 3 + x + x + 2 + x = 80 \\ 5 + 3x = 80
now you can find the value of x:
5 + 3 x = 80 \\ 3x = 80 - 5 \\ 3x = 75 \\ x =  \frac{75}{3}  = 25
the number of students in the second class is 25


you can find the others, too

first class: 25+ 3=28

third class: 25+ 2=27


good luck
You might be interested in
Shelly is a baker she is using batter to make pancakes. Which is the dependent variable the batter or the pancakes. Which is the
Nesterboy [21]

Answer:

The Pancakes are actually dependent while the Batter is Independent because your are changing the batter. Think of I change in an Independent variable. You cant really change the outcome which is the dependent.

Step-by-step explanation:

4 0
3 years ago
Solve m+18+23=71<br><br> PLZZZZZ I NEED THE ANSER PLZZZ
Aleksandr-060686 [28]

Answer:

m + 18 + 23 = 71

m + 41 = 71

m = 71 - 41

<u>m = 30</u>

8 0
2 years ago
Read 2 more answers
1 feet = _____ inches A.2 inches B.12 inches C.1.2 inches D.1 inch​
Advocard [28]

Answer:

its B!!!!!!

Step-by-step explanation:

have great day

7 0
3 years ago
Read 2 more answers
Help? please? ill give brainliest :)
lina2011 [118]

Answer:

Two 50 bottles

Step-by-step explanation:

because the 50 bottles is more cheaper than buying a n 80 ml bottle,

it's just a waste of money.

3 0
3 years ago
Read 2 more answers
Help.....................
Yuliya22 [10]

Answer:

See below

Step-by-step explanation:

(0,16) - y axis

(2, -12) - IV

(-1, 2) - II

(3, 0) - x axis

(36.7, 3.9) quadrant I

(-5/8, -5 1/3) - III

7 0
2 years ago
Read 2 more answers
Other questions:
  • erin needs 9.75 cups of flour to make 6 + 1/2 dozen cookies. how many cups of flour does erin need to make 1 dozen cookies
    13·1 answer
  • A circular gear turns 60 per hour. through how many radians does it turn in a 24-hour day?
    13·2 answers
  • Jerry bought toy trains at the store. He gave 15 away and had 9 left. Which of the following shows how
    13·1 answer
  • Which inequality is true? A. |-15| &gt; |-19| B. |-16| &lt; |13| C. |-15| &gt; |12| D. |12| &lt; |-8| E. |-19| &gt; |-20|
    9·2 answers
  • Original price of a dress:26.40,discount:10%
    14·1 answer
  • Se desea construir un vaso de papel en forma de cono circular recto que tenga un volumen de 25πcm3
    7·1 answer
  • The diameter of a circle is 10 meters. What is the circumference?
    10·1 answer
  • 5. Find mTOS in the figure below.
    8·1 answer
  • You and your best friend are meeting at
    6·1 answer
  • 28.5g of iron shot is added to graduated cylinder containing 45.50mL of water. The water level rises to 49.10mL mark, from this
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!