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
marysya [2.9K]
3 years ago
9

This is my sisters homework please help

Mathematics
1 answer:
tankabanditka [31]3 years ago
3 0

Answer: 12n crisp

Step-by-step explanation: you dont know n so you just put 12 with n next to it indicating 12 times n

You might be interested in
Please help me....I really need help!!
scoundrel [369]

\dfrac{c^2-4}{6c^4+15c^3}\div\dfrac{c^2+4c+4}{12c^3+30c^2}=\dfrac{c^2-2^2}{3c^3(2c+5)}\div\dfrac{c^2+2(c)(2)+2^2}{6c^2(2c+5)}\\\\_{\text{use}\ a^2-b^2=(a-b)(a+b)\ \text{and}\ (a+b)^2=a^2+2ab+b^2}\\\\=\dfrac{(c-2)(c+2)}{3c^3(2c+5)}\cdot\dfrac{6c^2(2c+5)}{(c+2)^2}=\dfrac{(c-2)}{c}\cdot\dfrac{2}{(c+2)}=\boxed{\dfrac{2(c-2)}{c(c+2)}}

6 0
3 years ago
Solve the following pairs of simultaneous equations.
Sergeeva-Olga [200]

Answer and step-by-step explanation:

a) -4x + 5y = -9 (2)

2x + 3y = 21

Multiply the second equation by 2, you will get:

4x + 6y = 42 (1)

Use (1) plus with (2), you will get:

4x + (-4x) + 6y + 5y = -9 + 42

11y = 33

y = 33/11

y = 3

4x + 18 = 42

4x = 24

x = 6

b) 2x + 5y = -6

3x + 2y = 2

Multiply first equation by 3, you will get:

6x + 15y = -18 (1)

Multiply the second equation by 2 and you will get:

6x + 4y = 4 (2)

Subtract (1) by (2), we got:

6x -6x + 15y - 4y = -18 - 4

11y = -22

y = -22/11

y = -2

6x + 4y = 4

6x -8 = 4

6x = 12

x = 2

c) 2x - 2y = -4

5x + 4y = 17 (2)

Multiply the first euation by 2, we got:

4x - 4y = -4 (3)

Use (3) minus for (2), we get:

4x - 5x -4y + 4y = -4 - 17

-x = -21

x = 21

4x - 4y = -4

84 - 4y = -4

-4y = -4 + 84

-4y = 80

y = 80 / -4

y = -20

d) 2x - 3y = 6

4x - 5y = 9 (1)

Multiply the first equation by 2, we got:

4x - 6y = 12 (2)

Use (1) minus for (2), we got:

4x -4x - 5y - 6y = 9 -12

-11y = -3

y = -3/-11

y = 3/11

2x - 3y = 6

2x - 9/11 = 6

2x = 66/11 + 9/ 11

2x = 75/11

x = 75/11 * 1/2

x = 75 / 22

e) x/2 + y/3 = 2

x/4 + y/3 = 4

Use the first equation subtract the second equation, we got:

x/2 - x/4 + y/3 - y/3 = 2 - 4

2x/4 -x/4 = -2

x/ 4 = -2

x = -2 * 4

x = -8

x/2 + y/3 = 2

-8 / 2 + y/3 = 2

y / 3 = 2 + 4

y/3 = 6

y = 6*3

y = 18

f) x/3 + y/2 = 3/2 (1)

x/2 + y/5 = -1/2 (2)

I don't know how to solve this, sr

Hope this helped :3

3 0
3 years ago
What’s the median for 55, 42, 78, 99, 69, 83, 74, 83, 97
soldier1979 [14.2K]
The median of this is 78
8 0
3 years ago
Subtract.<br> (6x + 5) - (x + 3)<br> A. 5x + 2<br> B. 6x + 2<br> C! 6x + 8<br> D. 5x + 8
Natali [406]

Answer: 5x + 2

Step-by-step explanation:

4 0
2 years ago
Read 2 more answers
Y/2 - (-1.12) = 3.12
ahrayia [7]

\fbox{y=4}

\frac{y}{2} -(-1.12)=3.12

Simplify:

\frac{1}{2} y+1.12=3.12

Subtract 1.12 on both sides:

\frac{1}{2} y+1.12-1.12=3.12-1.12

\frac{1}{2} y=12

Multiply both sides by 2:

2\times(\frac{1}{2} y)(2)\times(2)

y=4

4 0
1 year ago
Other questions:
  • Monica reads 7 1/2 pages of a mystery book in 9 minutes. What is her average reading rate in pages per minute?
    12·2 answers
  • Can someone please help?
    14·1 answer
  • Help please hurry im stupid :'( will mark brainlyest
    8·1 answer
  • Mr. custom is correcting the class's math homework on customary units. which of the following measurements is reasonable
    12·1 answer
  • Find the value of 9x+4y when x=4 and y=-3
    8·1 answer
  • Simplify 8x + y - 2x.
    8·2 answers
  • Drag the tiles to match each equation with its solution.
    15·2 answers
  • Find the value of x in the triangle shown below. 45° 56°
    9·1 answer
  • What is the reciprical and product of the fraction 3/7?​
    6·1 answer
  • Find the length of each arc. Round your answers to the nearest tenth. NO LINKS!! Part 1​
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!