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
Cerrena [4.2K]
4 years ago
7

Add and simplify (4-3n-5n^2)+(-2+n-3n^2)

Mathematics
2 answers:
Alina [70]4 years ago
7 0
The answer is D : 2-2n-8n^2
Effectus [21]4 years ago
4 0

Answer:

The answer is D) 2-2n-8n^2


You might be interested in
19) Albert says that the two systems of equations shown have the same solutions.
k0ka [10]

Answer:

option A) Agree, because the solutions are the same is correct.

Step-by-step explanation:

FIRST SYSTEM

6x + y= 2

-x-y=-3

solving the system

\begin{bmatrix}6x+y=2\\ -x-y=-3\end{bmatrix}

\mathrm{Multiply\:}-x-y=-3\mathrm{\:by\:}6\:\mathrm{:}\:\quad \:-6x-6y=-18

\begin{bmatrix}6x+y=2\\ -6x-6y=-18\end{bmatrix}

adding the equation

-6x-6y=-18

+

\underline{6x+y=2}

-5y=-16

so the system becomes

\begin{bmatrix}6x+y=2\\ -5y=-16\end{bmatrix}

solve -5y for y

-5y=-16

Divide both sides by -5

\frac{-5y}{-5}=\frac{-16}{-5}

simplify

y=\frac{16}{5}

\mathrm{For\:}6x+y=2\mathrm{\:plug\:in\:}y=\frac{16}{5}

6x+\frac{16}{5}=2

subtract 16/5 from both sides

6x+\frac{16}{5}-\frac{16}{5}=2-\frac{16}{5}

6x=-\frac{6}{5}

Divide both sides by 6

\frac{6x}{6}=\frac{-\frac{6}{5}}{6}

x=-\frac{1}{5}

Therefore, the solution to the FIRST SYSTEM is:

x=-\frac{1}{5},\:y=\frac{16}{5}

SECOND SYSTEM

2x-3y = -10

-x-y=-3

solving the system

\begin{bmatrix}2x-3y=-10\\ -x-y=-3\end{bmatrix}

\mathrm{Multiply\:}-x-y=-3\mathrm{\:by\:}2\:\mathrm{:}\:\quad \:-2x-2y=-6

\begin{bmatrix}2x-3y=-10\\ -2x-2y=-6\end{bmatrix}

-2x-2y=-6

+

\underline{2x-3y=-10}

-5y=-16

so the system of equations becomes

\begin{bmatrix}2x-3y=-10\\ -5y=-16\end{bmatrix}

solve -5y for y

-5y=-16

Divide both sides by -5

\frac{-5y}{-5}=\frac{-16}{-5}

Simplify

y=\frac{16}{5}

\mathrm{For\:}2x-3y=-10\mathrm{\:plug\:in\:}y=\frac{16}{5}

2x-3\cdot \frac{16}{5}=-10

2x=-\frac{2}{5}

Divide both sides by 2

\frac{2x}{2}=\frac{-\frac{2}{5}}{2}

Simplify

x=-\frac{1}{5}

Therefore, the solution to the SECOND SYSTEM is:

x=-\frac{1}{5},\:y=\frac{16}{5}

Conclusion:

As both systems of equations have the same solution.

Therefore, we conclude that Albert is right when says that the two systems of equations shown have the same solutions.

Hence, option A) Agree, because the solutions are the same is correct.

8 0
3 years ago
Juan ate 15 grapes in 30 seconds at this rate how long should it take him to eat 85 grapes
Ghella [55]
85 / 15 = 5 2/3
30 x 5 = 150
2/3 x 30 = 20
The answer is 170 seconds, or 2 minutes and 50 seconds
7 0
3 years ago
Read 2 more answers
PLEASE ANSWER ASAP FOR BRAINLEST!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Artyom0805 [142]

Answer:

Your second answer, otherwise know as 1 in. : 4ft. is the answer.

Step-by-step explanation:

The new map is 3 times bigger than the old map, therefore your given scale for the first map will shrink by 3 to compensate for the new map being bigger. Divide 12ft by 3 and you get 4 ft., so your answer is 1in. : 4ft.

4 0
3 years ago
+(-x)= *(*)<br> determine whether even,odd, or neither
larisa86 [58]

Answer:

neither

Step-by-step explanation:

3 0
3 years ago
Write the equation of the line in fully simplified slope-intercept form.
Ostrovityanka [42]
Y = 3x - 1
-------------
5 0
3 years ago
Other questions:
  • Simplify 2x^4y^5 * 3x^5y^7z^3
    8·1 answer
  • Are the two lines parallel,perpendicular,or neither?<br><br><br> 3x+7y=15 , 7x-3y=6
    6·1 answer
  • Mrs.mayuko paid $40.68 for 3 kg of shrimp. whats the cost of kilogram of shrimp?
    11·2 answers
  • Fractions equivalent to 27⁄81.
    12·2 answers
  • What is .038 squared written as a fraction in simplest form<br>​
    5·1 answer
  • Which expression demonstrates the distributive property applied to the expression 4(3 + 7)?
    5·2 answers
  • One airplane is at 7,000 feet and is descending 50 feet every second. Another plane is at
    14·1 answer
  • Help! 80 points! (picture below)
    10·2 answers
  • May y’all help me with this
    10·1 answer
  • Can someone explain how to do this for me? i don't get it like what am i supposed to do..
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!