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
UNO [17]
3 years ago
11

What is the first step to prove that 9n - 4n is divisible by 5?

Mathematics
1 answer:
EleoNora [17]3 years ago
3 0

Answer:

Collect like terms, ie do 9n-4n = 5n ...

5n will then be exactly divisible by 5 as 5n / 5 = n

You might be interested in
If 2/3 of a certain number is subtracted from twice the number, the result is 20. Find the number.​
sleet_krkn [62]

Let x be the number.

Set up an equation:

2x - 2/3x = 20

Simplify:

1 1/3x = 20

Divide both sides by 1 1/3

X = 15

The number is 15

3 0
3 years ago
Read 2 more answers
Can someone help me?
mart [117]
-2 + 8 = 6

because if you have 2 negative circles ●● and 8 positive circles ○○○○○○○○ then once you take away the first two circles you get you answer. You do the opposite. :) ( hope that make sense... )

3 0
4 years ago
Kendra was asked to find the number of students who planned to attend the evening symphony performance. She was told that 40 per
navik [9.2K]

Picture related to the question is attached below

Answer:

Kendra should have divided by 2 instead of multiplying by 2

Step-by-step explanation:

40 percent = percentage who plan to attend

100% = total percentage of student

From the question ;

When reducing percentages, division is employed and this the equation should be :

40/2 ÷ 100/2

40/2 * 2/100

20 * 1/50

20/50

= 0.4

0.4 * 50

= 20 students

6 0
3 years ago
Read 2 more answers
The fourth term of an Arithmetic Sequence is equal to 3 times the first term, and the seventh term exceeds twice the third term
11Alexandr11 [23.1K]

Answer:

The first term is 3. The common difference is 2.

Step-by-step explanation:

The first term is x.

The common difference is d.

The second term is x + d.

3rd term: x + 2d

4th term: x + 3d

7th term: x + 6d

"The fourth term of an Arithmetic Sequence is equal to 3 times the first term"

x + 3d = 3 * x       Eq. 1

"the seventh term exceeds twice the third term by 1"

x + 6d = 2(x + 2d) + 1       Eq. 2

Simplify Eq. 1:

2x = 3d

Simplify Eq. 2:

x + 6d = 2x + 4d + 1

x = 2d - 1

Multiply both sides of the last equation by 2.

2x = 4d - 2

2x = 3d   (simplified Eq. 1)

Since 2x = 2x, then the right sides are equal.

3d = 4d - 2

d = 2

2x = 3d

2x = 3(2)

2x = 6

x = 3

Answer: The first term is 3. The common difference is 2.

8 0
3 years ago
Once again a picture,, please help me with this one, thank you!!
vazorg [7]

Answer:

1395

Step-by-step explanation:

5 surfaces of the cuboid can be seen,so 5*l^2

4 surfaces of triangle = 4* 1/2 * 15 * 9

5 0
3 years ago
Read 2 more answers
Other questions:
  • In the figure below, triangle ABC is similar to triangle PQR, as shown below:
    10·2 answers
  • How do I show the work to figure out, how many inches are in 4.2 meters
    15·1 answer
  • What is the solution of the system of equations?<br> 4x-8y=0<br> 5x+2y=6
    8·1 answer
  • An orange juice producer buys oranges from a large orange grove that has one variety of orange. The amount of juice squeezed fro
    13·1 answer
  • The figure shows the front side of a purse in the shape of a trapezoid.
    15·1 answer
  • Assume that a password must be at least 8 characters long and include at least 1 digit and at least 1 special character. If peop
    12·1 answer
  • What are benefits of good study habits? Check all that apply.
    9·1 answer
  • A number p divided by 7 is less than -3​
    5·1 answer
  • Please help me. 20 POINTS
    9·1 answer
  • Simplify radical 5 times 8 + 3 with a radical of 6
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!