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
bogdanovich [222]
3 years ago
6

Could someone explain 21 = -7n please?

Mathematics
1 answer:
Roman55 [17]3 years ago
3 0

Answer:

n = -3

Step-by-step explanation:

The question is asking you to solve for your variable N. To do so, you must use difference operation(s) and their respective principle of equality to isolate the variable.

To get n by itself on one side of the variable, the term -7n by -7. What you do to one side of the equal sign, you must also do to the other due to the division principle of equality. Thus, you also divide 21 by -7.

\frac{21}{-7} = \frac{-7n}{-7}

Once you simplify, you are left with -3 = n or n = -3, which is your answer.

You might be interested in
A manager records the repair cost for 4 randomly selected TVs. A sample mean of $88.46 and standard deviation of $17.20 are subs
timurjin [86]

Answer:

NO WAY ITS INSANE

Step-by-step explanation:

5 0
3 years ago
determine if it can be proven that the triangles are congruent if they are the choose a theorem that proves its congruent ​
Lostsunrise [7]

Answer:

These triangles are congruent by SAS

Step-by-step explanation:

They share the same angle which is in the same angle which is the vertical angle with congruent sides on either side of the angle, therefore this is congruent by SAS.

7 0
3 years ago
please help me i need this done today report cards are coming out this Friday i tried solving them but i can't please helpp
Lapatulllka [165]

Answer:

c; 180 cm

Step-by-step explanation:

5 0
2 years ago
Derek and Donnie mow 15 lawns over two 2 days. If Derek mows 3 lawns per hour and Donnie mows 2 lawns per hour, write an equatio
fenix001 [56]

Answer:the two equations that model the situation are

x + y = 48

3x + 2y = 15

Step-by-step explanation:

Let x represent the total number of hours that Derek worked.

Let y represent the total number of hours that Donnie worked.

Derek and Donnie mow 15 lawns over two 2 days. There are 24 hours in a day. Therefore, the number of hours in 2 days would be 2 × 24 = 48 hours. Therefore

x + y = 48 - - - - - - - - - -1

If Derek mows 3 lawns per hour and Donnie mows 2 lawns per hour, it means that

3x + 2y = 15 - - - - - - - - - 2

4 0
3 years ago
What is the area of a triangle with vertices at (−2, 1) , (2, 1) , and ​ (3, 4) ​ ?
LuckyWell [14K]

The area of a triangle is determined by the formula: Base x Height * 1/2

 

You'll need to assign a base to the triangle. Based on the vertices given, the simplest base would be the line segment from (-2,1) to (2,1). The distance between any two numbers is found by just subtracting them. Here, you should subtract the x values to find the distance of this side.

 

2 - (-2) = 4.

 

So the distance (aka the length of the base) is 4. The height of the triangle is the distance between the base and the highest point on the triangle which is (3,4). We should subtract the y values this time to find the height/distance.

 

4 - 1 = 3

 

So the height is 3.

 

Base = 4

Height = 3

8 0
3 years ago
Other questions:
  • I have an assignment and I am having trouble with it. Can someone please help ASAP???
    15·1 answer
  • Write each fraction in its simplest form 18/4 and 24/32
    15·2 answers
  • 1.
    12·1 answer
  • Find the slope intercept form of the equation that passes through the given point and is parallel to the given line (-3,2) and y
    9·1 answer
  • Which expression have a value -7
    10·1 answer
  • -3w² + x2 – 5W + 4x²
    14·1 answer
  • Johan always wears a shirt, pants, socks, and shoes. He owns 20 pairs of socks, 5 pairs of shoes, 10 pairs of pants, and 8 shirt
    12·2 answers
  • What is 508.93 rounded to the nearest tenth
    13·2 answers
  • 39.76 divided by 2.8
    8·1 answer
  • What would the answer be for this equation 7x/20 - 5x/12
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!