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
My name is Ann [436]
3 years ago
14

Solve the system.3 x - 1 2 y = 1 1 4 x + 3 8 y = -1

Mathematics
1 answer:
Len [333]3 years ago
5 0

Answer:

y = -13/14 and x = 240/7

Step-by-step explanation:

3x - 12y = 114 ............eqn 1

x + 38y = -1 ..........eqn 2

Multiply eqn 2 by 3

3x + 114 = -3

Subtract eqn 2 from 1

3x - 12y = 114

- 3x + 114 = -3

____________

0 - 126y = 117

y = 117/-126

y = -13/14

Sub y = -13/14 in eqn 1

3x - 12(-13/14) = 114

3x + 78/7 = 114

Multiply through by 7

21x + 78 = 798

21x = 798 - 78

21x = 720

x = 720/21

x = 240/7 = 34.29

You might be interested in
Help Help Help please!
sergij07 [2.7K]

Answer:

this might take a while

7 0
3 years ago
Write an equation that can be used to find the value of x. The perimeter of rectangle: 32 Length of the other side: 4
Sati [7]

Answer:

x=12

Step-by-step explanation:

32=2(4+x)

distribute 2.  

32=8+2x

subtract 8 from both sides.  

32=8+2x

-8   -8

24=2x

divide by 2 on both sides

24/2=2x/2

12=x

6 0
2 years ago
What is 13/20 as a part to part ratio
notsponge [240]

65%

Convert fraction (ratio) 13 / 20 Answer: 65%

7 0
3 years ago
6. Mrs. Sam buys pencils for $15 per one hundred packs.
Alexxx [7]

Answer:

a.) her loss is 5 dollars

b.) her profit is 10 dollars

c.) she should sell them for $0.15

4 0
3 years ago
It takes 54 minutes for 4 people to paint 6 walls. How many minuets does it take 6 people to paint 7 walls?
earnstyle [38]

It takes 42 minutes for 6 people to paint 7 walls

<em><u>Solution:</u></em>

It takes 54 minutes for 4 people to paint 6 walls

To find: Minutes required for 6 people to paint 7 walls

If M_1 men can do W_1 work in D_1 days working H_1 hours per day and M_2 men can do W_2 work in D_2 days working H_2 hours per day, then

\frac{M_1D_1H_1}{W_1} = \frac{M_2D_2H_2}{W_2}

M = Number of men

D = Number of days

H = Number of hours per day

W = Amount of work

Here in this sum,

<em><u>54 minutes for 4 people to paint 6 walls</u></em>

H_1 = 54 minutes ; M_1 = 4 people ; W_1 = 6 walls

<em><u>Minutes required for 6 people to paint 7 walls</u></em>

H_2 = ? ; M_2 = 6 people ; W_2 = 7 walls

<em><u>Substituting the values in formula, we get</u></em>

\frac{54 \times 4}{6} = \frac{H_2 \times 6}{7}\\\\9 \times 4 = \frac{H_2 \times 6}{7}\\\\H_2 = \frac{36 \times 7}{6}\\\\H_2 = 42

Thus it takes 42 minutes for 6 people to paint 7 walls

7 0
3 years ago
Other questions:
  • What does 5/15 equal
    9·2 answers
  • Use two unit multipliers to convert 12 miles to inches
    15·2 answers
  • What is the slope of a line parallel to the line who se equation is 6x -3y= 63
    11·1 answer
  • How many complete pieces of ribbon 7/8cm long can be cut from a roll of ribbin that is 149 cm long
    13·2 answers
  • Plese help fasthjfjfjfjfjfjfjfjf
    6·1 answer
  • What is the solution to this inequality?<br><br> 14 + x ≤ 26
    15·2 answers
  • Determine which binomial is a factor of 4x^3+17x^2+7x+12 A. X+12 B. x +4 C. x +7 D. X-4
    11·1 answer
  • What’s the answer of this formula in the photo
    13·1 answer
  • Carol is baking cookies and needs 2 1/4 cup of flour,2/3 cup of white sugar, 1/4 cup of brown sugar and 1/16 cup of baking soda.
    7·2 answers
  • Direct materials variances
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!