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
Find “X” thank you!!!! <33
xxTIMURxx [149]

Answer:

Step-by-step explanation:

If we assume that the angle at A is 90 degrees.. which it does seem like it would be.  then use that the sum of the angles around the inside of a right triagle is 180 .   so  you have

180 = 37 + 90 + x

53° = x  

does that help?

4 0
2 years ago
I have two bags. bag 1 contains 1010 blue marbles, while bag 2 contains 1515 blue marbles. i pick one of the bags at random, and
dimulka [17.4K]
55 blue or red marbles,

55-22 = 33 blue marbles

bag1+bag2= 2525

bag1=.4 

33/55=.6  blue marbles

bag 2=.6

so it is 40% that U choose bag 1 















6 0
2 years ago
NEED HELP!
Citrus2011 [14]

Answer:

Michelle, because she was only 5 off, while Jae was 8 off

8 0
2 years ago
What percent of 75 is 25
nikdorinn [45]
P / 100 = 25 / 75;

p = 2500 / 75 ;

p = 33.33;

p% = 33.33%
4 0
3 years ago
Please helpppp....????​
-BARSIC- [3]

Answer:

x = 45

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right

Equality Properties

<u>Geometry</u>

  • All angles in a triangle add up to 180°

Step-by-step explanation:

<u>Step 1: Set up Equation</u>

x + (x + 65) + 25 = 180

<u>Step 2: Solve for </u><em><u>x</u></em>

  1. Combine like terms:                     2x + 90 = 180
  2. Isolate <em>x</em> term:                               2x = 90
  3. Isolate <em>x</em>:                                        x = 45
8 0
3 years ago
Other questions:
  • Find the center, vertices, and foci of the ellipse with equation x squared divided by 400 plus y squared divided by 625 = 1
    6·2 answers
  • On Saturday Emma made a basket in 36 out of 80 attempts with a basketball. On Sunday she made a basket in 11 out of 20 attempts.
    13·2 answers
  • Fill in the blank to make the ratios equivalent.<br> 20: 160<br> 1:
    12·2 answers
  • Write an equation, in the slope intercept form, of the line with an x-intercept at (3 , 0) and a y-intercept at (0 , -5).
    15·1 answer
  • I need help with this problem
    13·2 answers
  • Help me plssssssssssssssssssssssssssssss
    6·1 answer
  • NO LINKS PLEASE and make sure it's correct
    15·1 answer
  • What is 22.5 as a mixed number/ In it's simplest form?
    12·2 answers
  • Jordie is getting balloons for his aunt's birthday party. He wants each balloon string to be 12 feet long. At the party store, s
    15·1 answer
  • Anthony is planning a trip, using
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!