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
lions [1.4K]
3 years ago
13

What is the soultion of - 21 = n - 8 what is n

Mathematics
1 answer:
xenn [34]3 years ago
8 0
This is a simple equation:)
We have to isolate "n" to be alone. 
-21 = n - 8 

First add 8 to both sides. 
-21 = n - 8
+8  =    + 8 it cancels out on the right side of the equal side and you solve on the left side

soooo
-21 + 8 = -13
-13 = n 

Finally our answer is
-13 = n  



When in doubt, eat a pineapple:)

You might be interested in
Identify any extrema of the function by recognizing its given form or its form after completing the square. Verify your results
Andrews [41]

Answer:

Step-by-step explanation:

Given that,

g(x, y) = 5 - (x - 3)² - (y + 2)²

Let find the grad of the function,

The grad of a function is defined as

∇g= ∂g/∂x •i + ∂g/∂y •j + ∂g/∂z •k

∇g = gx•i + gy•j + gz•k

gx = -2(x-3) = -2x+6

gy = -2(y+2) = -2y -4

∇g = (-2x+6) •i + (-2y-4)•j

We have a maximum or a minimum If g conservative, then, ∇g = 0i +0j

Then comparing this to the grad of the function

(-2x+6) •i + (-2y-4)•j = 0i +0j

Then, -2x+6 = 0

2x=6

x = 3

Also, -2y-4=0

-2y=4

y = -2

Then, g(x, y) = 5 - (x - 3)² - (y + 2)²

g(x, y) = 5 - (3 - 3)² - (-2 + 2)²

g(x, y) = 5

So the critical point is (3, -2, 5)

gx =-2x+6

Second derivative of gx with respect to x

gxx=-2

gy=-2y-4

Second derivative of gy with respect to y

gyy=-2

Second derivative of gx with respect to y

gxy =0

d =gxxgyy - (gxy)²

Then, gyy=gxx

d = -2×-2 -0²

d = 4-0=4

Since d>0

Since d is greater than 0, then, it is not a chair points.

Then, since gxx=-2<0, gyy=-2<0

Cause the second derivative in x (or in y) is less than zero, then the point is relatively maximum

So the maximum point is (3, -2, 5).

6 0
3 years ago
Suppose a principal amount of $2079 were invested into a simple interest account that pays an annual rate of 2.31% then the amou
Anna35 [415]

Answer:

The amount of interest earned at the end of 14 years would be $672.3486

Step-by-step explanation:

This is a simple interest problem.

The simple interest formula is given by:

E = P*I*t

In which E are the earnings, P is the principal(the initial amount of money), I is the interest rate(yearly, as a decimal) and t is the time.

In this problem, we have that:

P = 2079, I = 0.0231, t = 14

So

E = 2079*0.0231*14 = 672.3486

The amount of interest earned at the end of 14 years would be $672.3486

4 0
3 years ago
HELP PLEASE!! Brainliest to whoever gets it right.
Aleks04 [339]

Answer:

A

Step-by-step explanation:

i think you might want to wait for other people because i dont  know for sure

4 0
3 years ago
Read 2 more answers
How to express the radical using the imaginary unit , i. Please help
Hitman42 [59]

Answer:

± 4i\sqrt{5}

Step-by-step explanation:

\sqrt{-80} = \sqrt{16(5)(-1)}

= \sqrt{16} × \sqrt{5} ×\sqrt{-1}

= 4\sqrt{5}i → [ \sqrt{-1} = i ]


3 0
3 years ago
Solve the equation 4x-2(x+3)=8
sammy [17]

Answer:

4x-2x-6=8

2x-6=8

2x=8+6

2x=14

x= 14/2

x= 7

3 0
3 years ago
Read 2 more answers
Other questions:
  • Please answer this correctly
    12·2 answers
  • On an airplane, there are two seats on the left side in each row and three seats on the right side. There are 90 seats on the ri
    12·2 answers
  • Line m has no y-intercept, and its x-intercept is (3, 0). Line n has no x-intercept, and its y-intercept is (0, -4).
    14·2 answers
  • A country's population in 1990 was 123 million.In 2002 it was 128 million.Estimate the population in 2013 using the exponential
    11·1 answer
  • A building 30 feet tall casts a shadow 20 feet long. A person 6 feet tall is walking directly away from the building toward the
    8·1 answer
  • Transformation of functions
    6·1 answer
  • Can I get some help :/
    7·1 answer
  • Please help me i need someone to help me through this whole thinggggg ill mark u as brainlist ​
    12·2 answers
  • Will mark brainliest! The ratio of the angles in a triangle is 2:3:5. What are the angle measures.
    5·2 answers
  • The variables x and y vary directly. Use the values to find the constant of proportionality, k. Then write an equation that rela
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!