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
Vikentia [17]
3 years ago
6

Does any one know how to solve this -4n^2-2n=-6-7n-5n^2

Mathematics
2 answers:
den301095 [7]3 years ago
6 0
-4n^2-2n=-6-7n-5n^2 \\ -4n^2-2n+6+7n+5n^2=0\\n^2+5n+6=0 \\ n^2+2n+3n+6=0 \\ n(n+2)+3(n+2)=0 \\ (n+2)(n+3)=0 \\ n+2=0 \ \ \ \ or \ \ \ \ n+3=0\\n=-2 \ \ \ \ \ \ \ \ \ \ \ \  \   n=-3

Answer: n=-2, n=-3
zaharov [31]3 years ago
3 0
-4n^2-2n=-6-7n-5n^2

Add 5n^2 to both sides
n^2-2n=-6-7n

Add 7n to both sides
n^2+5n=-6

Add 6 to both sides to put the equation into quadratic standard form
n^2+5n+6=0

Factor the equation
(n+2)(n+3)=0

3+2=5, 3*2=6

To solve a quadratic equation, find roots using Zero Product Property.
(n+2)=0
n=-2

(n+3)=0
n=-3

Final answers: n=-3, n=-2
You might be interested in
Which rule describes the transformation that is a reflection across the x-acis
Alla [95]

Answer:

When you reflect a point across the line y = x, the x-coordinate and y-coordinate change places. If you reflect over the line y = -x, the x-coordinate and y-coordinate change places and are negated (the signs are changed). the line y = x is the point (y, x). the line y = -x is the point (-y, -x).

7 0
3 years ago
Pretty please lmk what this is
Gnesinka [82]

Answer:

Donda

Step-by-step explanation:

3 0
3 years ago
The half-life of Radium-226 is 1590 years. If a sample contains 200 mg, how many mg will remain after 1000 years?
adell [148]

Answer: 129.33 g

Step-by-step explanation:

$$Let $p=A \cdot e^{n t}$ \\$(p=$ present amount, $A=$ initial amount, $n=$ decay rate, $t=$ time)

\begin{aligned}&\Rightarrow \text { Given } p=\frac{A}{2} \ a t  \ t=1590 \\&\Rightarrow \frac{1}{2}=e^{1590n} \Rightarrow n=\frac{\ln (1 / 2)}{1590}=-0.00043594162\end{aligned}

$$If $A=200 \mathrm{mg}$ and $t=1000$ then,$$\begin{aligned}P &=200 e^{\left(\frac{\ln \left(1/2\right)}{1590}\right) \cdot 1000} \text \\\\&=129.33 \text { grams}\end{aligned}$$

3 0
2 years ago
I need help with 18, 19, & 20
luda_lava [24]
18. 17.9 
19. 21.1
20. I cant see the numbers sorry; if the sides are 6, √85 than it should have an angle of 40.6
4 0
3 years ago
What is the standard form of the line with x-intercept of 6 and y-intercept of 5?
Vanyuwa [196]

Answer:

It should be 5x-6y=30

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Other questions:
  • Find two consecutive even integers whose sum is 126
    11·2 answers
  • Jamie needs to determine the distance across a river. She selects a rock, R, on the opposite river bank. She finds a tree, T, on
    8·2 answers
  • A triangle is formed with side lengths of 7 inches,24 inches,and 25 inches.is the triangle a right triangle​
    12·1 answer
  • James and Sara participated in a walking program for 7 days. James walked 2 miles every day. Sara walked 2 1 miles every day Whi
    13·1 answer
  • Billy must decide whether he will stay home or go to a friend’s house. If he stays home, he can watch tv or play ps4. If he goes
    15·1 answer
  • Write 1 390 000 in standard form.
    15·1 answer
  • Solve In(x – 2) – In(x – 3) = 1. Round your answer to three decimal places.
    7·1 answer
  • Find the surface area.
    10·1 answer
  • PLS HELP!! need the answer asap
    13·1 answer
  • RJ trips over his shoe laces every 15 steps. Matthew says "gottem" every 6
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!