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
Allushta [10]
3 years ago
10

What does n equal? 2=-9n+22-n

Mathematics
2 answers:
velikii [3]3 years ago
5 0

Answer:

n =2

Step-by-step explanation:

2=-9n+22-n

2 = -10n +22

-20 = -10n

n = 2

MrRissso [65]3 years ago
3 0

Step-by-step explanation:

Grouping like terms

9n+n=22-2

10n=20

Dividing through by 10

n=2

You might be interested in
Write a program that mimics a calculator. The program should take as input: The first integer The second integer The operation t
SashulF [63]

It takes value from a user and then user the operation of (+,-,*/).

i used c++ programming language to solve this program:

#include<iostream>

using namespace std;

int main() {

int var1, var2;

char operation;

cout << "Enter the first number : ";

cin >> var1;

cout << endl;

cout <<"Enter the operation to be perfomed : ";

cin >> operation;

cout << endl;

cout << "Enter the second nuber : ";

cin >> var2;

cout << endl;

bool right_input = false;

if (operation == '+') {

cout << var1 << " " << operation << " " << var2 << " = " << (var1 + var2);

right_input = true;

}

if (operation == '-') {

cout << var1 << " " << operation << " " << var2 << " = " << (var1 - var2);

right_input = true;

}

if (operation == '*') {

cout << var1 << " " << operation << " " << var2 << " = " << (var1 * var2);

right_input = true;

}

if (operation == '/' && var2 != 0) {

cout << var1 << " " << operation << " " << var2 << " = " << (var1 - var2);

right_input = true;

}

if (operation == '/' && var2 == 0) {

cout << "Error. Division by zero.";

right_input = true;

}

if (!right_input) {

cout << var1 << " " << operation << " " << var2 << " = " << "Error;";

cout << "Invalid Operation!";

}

cout << endl;

system("pause");

return 0;

}

7 0
3 years ago
!!!!!!!!!!!!!!!!!!!!!1
Aleksandr [31]

Answer:

3x36  

Step-by-step explanation:

Because he is getting 36 3 times so 3x36

By a Fourth grader

8 0
2 years ago
Read 2 more answers
The portion of the parabola y²=4ax above the x-axis, where is form 0 to h is revolved about the x-axis. Show that the surface ar
castortr0y [4]

Answer:

See below for Part A.

Part B)

\displaystyle h=\Big(\frac{125}{\pi}+27\Big)^\frac{2}{3}-9\approx7.4614

Step-by-step explanation:

Part A)

The parabola given by the equation:

y^2=4ax

From 0 to <em>h</em> is revolved about the x-axis.

We can take the principal square root of both sides to acquire our function:

y=f(x)=\sqrt{4ax}

Please refer to the attachment below for the sketch.

The area of a surface of revolution is given by:

\displaystyle S=2\pi\int_{a}^{b}r(x)\sqrt{1+\big[f^\prime(x)]^2} \,dx

Where <em>r(x)</em> is the distance between <em>f</em> and the axis of revolution.

From the sketch, we can see that the distance between <em>f</em> and the AoR is simply our equation <em>y</em>. Hence:

r(x)=y(x)=\sqrt{4ax}

Now, we will need to find f’(x). We know that:

f(x)=\sqrt{4ax}

Then by the chain rule, f’(x) is:

\displaystyle f^\prime(x)=\frac{1}{2\sqrt{4ax}}\cdot4a=\frac{2a}{\sqrt{4ax}}

For our limits of integration, we are going from 0 to <em>h</em>.

Hence, our integral becomes:

\displaystyle S=2\pi\int_{0}^{h}(\sqrt{4ax})\sqrt{1+\Big(\frac{2a}{\sqrt{4ax}}\Big)^2}\, dx

Simplify:

\displaystyle S=2\pi\int_{0}^{h}\sqrt{4ax}\Big(\sqrt{1+\frac{4a^2}{4ax}}\Big)\,dx

Combine roots;

\displaystyle S=2\pi\int_{0}^{h}\sqrt{4ax\Big(1+\frac{4a^2}{4ax}\Big)}\,dx

Simplify:

\displaystyle S=2\pi\int_{0}^{h}\sqrt{4ax+4a^2}\, dx

Integrate. We can consider using u-substitution. We will let:

u=4ax+4a^2\text{ then } du=4a\, dx

We also need to change our limits of integration. So:

u=4a(0)+4a^2=4a^2\text{ and } \\ u=4a(h)+4a^2=4ah+4a^2

Hence, our new integral is:

\displaystyle S=2\pi\int_{4a^2}^{4ah+4a^2}\sqrt{u}\, \Big(\frac{1}{4a}\Big)du

Simplify and integrate:

\displaystyle S=\frac{\pi}{2a}\Big[\,\frac{2}{3}u^{\frac{3}{2}}\Big|^{4ah+4a^2}_{4a^2}\Big]

Simplify:

\displaystyle S=\frac{\pi}{3a}\Big[\, u^\frac{3}{2}\Big|^{4ah+4a^2}_{4a^2}\Big]

FTC:

\displaystyle S=\frac{\pi}{3a}\Big[(4ah+4a^2)^\frac{3}{2}-(4a^2)^\frac{3}{2}\Big]

Simplify each term. For the first term, we have:

\displaystyle (4ah+4a^2)^\frac{3}{2}

We can factor out the 4a:

\displaystyle =(4a)^\frac{3}{2}(h+a)^\frac{3}{2}

Simplify:

\displaystyle =8a^\frac{3}{2}(h+a)^\frac{3}{2}

For the second term, we have:

\displaystyle (4a^2)^\frac{3}{2}

Simplify:

\displaystyle =(2a)^3

Hence:

\displaystyle =8a^3

Thus, our equation becomes:

\displaystyle S=\frac{\pi}{3a}\Big[8a^\frac{3}{2}(h+a)^\frac{3}{2}-8a^3\Big]

We can factor out an 8a^(3/2). Hence:

\displaystyle S=\frac{\pi}{3a}(8a^\frac{3}{2})\Big[(h+a)^\frac{3}{2}-a^\frac{3}{2}\Big]

Simplify:

\displaystyle S=\frac{8\pi}{3}\sqrt{a}\Big[(h+a)^\frac{3}{2}-a^\frac{3}{2}\Big]

Hence, we have verified the surface area generated by the function.

Part B)

We have:

y^2=36x

We can rewrite this as:

y^2=4(9)x

Hence, a=9.

The surface area is 1000. So, S=1000.

Therefore, with our equation:

\displaystyle S=\frac{8\pi}{3}\sqrt{a}\Big[(h+a)^\frac{3}{2}-a^\frac{3}{2}\Big]

We can write:

\displaystyle 1000=\frac{8\pi}{3}\sqrt{9}\Big[(h+9)^\frac{3}{2}-9^\frac{3}{2}\Big]

Solve for h. Simplify:

\displaystyle 1000=8\pi\Big[(h+9)^\frac{3}{2}-27\Big]

Divide both sides by 8π:

\displaystyle \frac{125}{\pi}=(h+9)^\frac{3}{2}-27

Isolate term:

\displaystyle \frac{125}{\pi}+27=(h+9)^\frac{3}{2}

Raise both sides to 2/3:

\displaystyle \Big(\frac{125}{\pi}+27\Big)^\frac{2}{3}=h+9

Hence, the value of h is:

\displaystyle h=\Big(\frac{125}{\pi}+27\Big)^\frac{2}{3}-9\approx7.4614

8 0
3 years ago
Read 2 more answers
What is missing for the following quantity to be true? 3a . 4y . 5=5 . 3a
irakobra [83]
It's 4y because it is multiplying, meaning it does not matter the order of the numbers and variables.
4 0
3 years ago
Read 2 more answers
1.) 3/4 (x+2)=-1<br><br><br> 2.) x/2 - 3 = 4<br><br><br> 3/4x - 3/4 = 0
alex41 [277]
Answers
1. X= -10/3
2. X= 14
3. true
4 0
3 years ago
Other questions:
  • A)A cuboid with a square x cm and height 2xcm². Given total surface area of the cuboid is 129.6cm² and x increased at 0.01cms-¹.
    12·1 answer
  • ANSWER ASAP!!!!!!!!!!
    13·1 answer
  • Suppose a circle has a circumference 16pi units. what is its radius
    10·2 answers
  • If 2a-8=4 and 3b-8=10, what is the value of a+b?
    10·2 answers
  • Which expressions are equivalent?
    14·2 answers
  • Payton cut out two shapes, as shown, that she will later put together to resemble a house. What is the total area of the two sha
    8·2 answers
  • A new car worth 25,000 is depreciating(loses value) in value by 1,250 per year. Determine how many years will it take for the ca
    7·1 answer
  • 1.221 x 1/100 =<br> answer with the product. Correct answer will be awarded with branliest
    7·1 answer
  • Help me to get Brainliest
    5·1 answer
  • 1. Trey just planted a small tree. He wanted to help it grow straight so he anchored the tree to the ground in three places usin
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!