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
disa [49]
2 years ago
7

8) A school community had planned to reduce the number of grade 9 students per class room by constructing additional class rooms

. However, they constructed 4 less rooms than they planned. As the result, the number of students per class 10 more than they planned. If there are 1200 grade nine students in the school, determine the current number of class rooms and the number of students per class.​
Mathematics
1 answer:
Allisa [31]2 years ago
7 0

Step-by-step explanation:

Let "c" be the original number of classrooms.

The 1200/c was the original number of students per classroom.

----

Equation:

1200/(c-4) = (1200/c)+10

Multiply thru by c(c-4)

---

1200c = 1200(c-4)+10c(c-4)

---

1200c = 1200c-4800 + 10c^2-40c

----

10c^2-40c-4800 = 0

c^2-4c-480 = 0

Factor:

(c-24)(c+20) = 0

---

Positive solution:

c = 24 (# of classrooms originaly planned)

You might be interested in
Wing figures, solve for x. Complete parts (a) 80° 53​
Korolek [52]

Answer:

x = 25°

Step-by-step explanation:

Applying,

Sum of the angle in the triangle = 180°

From the diagram,

First angle of the triangle = 55° (vertically opposite angles are equal)

Second angle of the traingle = 180-80 = 100° (sum of the angle in a straight line)

Third angle of the triangle = x

Therefore,

x+55+100 = 180

x+155 = 180

x = 180-155

x = 25°

7 0
2 years ago
=
Kitty [74]

Answer:

2

Step-by-step explanation:

6 0
2 years ago
Find the product of<br> 2x^2(x + 3)
KengaRu [80]

Answer:

16x

Step-by-step explanation:

2x^2(x+3)

2 times 2 = 4

4x(x+3)

4x + 12x =

16x

5 0
3 years ago
Multiply: 5x(2x4 – x3 + 3)
Leno4ka [110]

Answer:

10

x

5

A

−

5

x

4

A

+

15

x

A

Step-by-step explanation:

6 0
3 years ago
Can you find a math trick to play on a family member or friend? Be creative!
Makovka662 [10]
2x+3x=
X is simply a letter
6 0
3 years ago
Other questions:
  • What are all the factors of 120
    14·2 answers
  • I need help with this please ​
    9·1 answer
  • Write the equation 9y = 12x + 0.2 in standard form. Identify A, B, and C.
    9·1 answer
  • What is the imgae point of (-2,-3) after a translation right 2 units and 4 up units?​
    6·1 answer
  • What is the measure of the third angle of a triangle if one angle measures 35° and the second angle measures 40°?
    5·1 answer
  • Please help with this
    7·1 answer
  • PLA HELP I'LL MARK BRAINLEST
    14·2 answers
  • If one inch represents 65 on a map, then how many inches will represent 2,300 miles?
    8·1 answer
  • A delivery person uses a service elevator to bring boxes of books up to an office. The delivery person weighs 150 lb and each bo
    13·1 answer
  • Why would we use m^3 instead of cm^3 to describe the volume of a room?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!