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
Julli [10]
3 years ago
6

7 (n+4) = 21 Please help me solve this

Mathematics
2 answers:
RoseWind [281]3 years ago
7 0
Answer is n= -1 Explanation first thing you need to do is to divide the 7 and 21 to get n+4=3. After that move the constant 4 and switch it with 3. N+3=4. Then calculate n+3=4 to get n= -1
deff fn [24]3 years ago
5 0

Answer:  n = -1

Step-by-step explanation: distribute 7 to n +4 to get 7n +28 = 21

subtract 28 on both sides, to get 7n= -7 divide by positive 7, and get n=-1

plug it in to check 7(-1+4)=21

-1+4= 3

7(3)= 21

it checks out ^_^

You might be interested in
Classify the equation, 7x+6=7x-5, as having one solution, no solution, or infinitely many solutions.
Ksenya-84 [330]

Answer:

Step-by-step explanation:

7x + 6 = 7x - 5

Collecting like terms

7x - 7x = -5 - 6

The x is canceled out so no solution

5 0
3 years ago
A grapefruit is 8% heavier than an orange, and an apple is 10% lighter than the orange.
likoan [24]
Weight of an grapefruit=weight of an orange+8% weight of an orange
weight of an apple=weight of an orange -10% weight of an orange

a.<span>By what percentage is the grapefruit heavier than the apple?
We should find the connection between grapefruit and an apple. We know the connection between the weight of a grapefruit and an orange, we know the connection between an orange and an apple, so this means we know the connection between a grapefruit and an apple.
</span>
weight of an grapefruit=weight of an <span>orange+8% weight of an orange
</span>weight of an orange=weight of an apple<span> +10% weight of an apple
</span>
-> weight of an grapefruit=weight of an apple+10% weight of an apple + 8%(weight of an apple+10% weight of an apple)= weight of an apple + 18% weight of an apple + 2% weight of an apple= <span>weight of an apple + 20% weight of an apple 

</span><span>b.By what percentage is the apple lighter than the grapefruit?
</span>weight of an grapefruit=weight of an apple + 20% weight of an apple<span> 
</span>
-> The apple ts 20% lighter than the grapefruit.
8 0
3 years ago
Read 2 more answers
I don't know how to do this☹
bazaltina [42]
Multiply all of those numbers
3 0
3 years ago
If you can’t see the bottom part it’s an 8 ..so anybody ??! Help
jolli1 [7]

Multiply both sides by the reciprocal (-8/7). You would get 40/7 or 5.71428571

8 0
3 years ago
Learning Task II. Illustrate the following: Illustration Given 1. Line Segment MN 2. Ray XY 3. Ray YX 4. Angle ABC 5. LK​
Mashutka [201]

The illustration of the given mathematical elements is as in the attached images.

<h3>Illustration of mathematical elements</h3>

For line segments;

  • The beginning and end of the line are specified by the assigned alphabets.

However, for rays;

  • The ray is illustrated to originate from a point and span on from there till infinity.

For angles;

  • The alphabet in the middle of the set of 3 alphabets used to identify the angle represents the center point of where the angle is located.

Read more on illustration of mathematical elements;

brainly.com/question/18430725

6 0
2 years ago
Other questions:
  • Find the quoatient of 1 2/3 and 6
    13·1 answer
  • Stephanie drew this triangle how many obtuse triangle’s are the triangle have
    12·2 answers
  • A spotlight is mounted on a wall 7.4 feet above a security desk in an office building. It is used to light an entrance door 9.3
    13·1 answer
  • I need help ASAP! I don’t understand this so I was hoping anyone would help
    11·1 answer
  • What is 150 percent of 22
    12·2 answers
  • 4. What is the volume of the prism below?<br> 12 in<br> 9 in<br> 16 in
    7·1 answer
  • HELP PLEAAASEEEEE<br>Can someone find the domain and range of this function PLEASE<br>y = 2/x + 3
    10·1 answer
  • PLS GUYS HELP IMMA FAIL PLS PLS PLS
    10·1 answer
  • Solve by elimination and show all steps please <br><br><br> 3x=2y-7, 2x-y=10
    11·2 answers
  • Round to the nearest hundredth?<br><br>A<br><br>4<br><br>?<br><br>35°<br><br>с<br><br>B
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!