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
ss7ja [257]
4 years ago
12

What is the first step in solving, 3x - 12y=5 3y -x=9, using the elimination method

Mathematics
1 answer:
mote1985 [20]4 years ago
3 0
3x-12y = 5
-x+3y = 9

First step is to make the coefficient of either x or y same.

3x-12y = 5
(-x+3y = 9)3

3x-12y = 5
-3x+9y = 27

-4y = 32
y = -8
You might be interested in
Whats the value of the expression<br><br> 10x(2.5+13.5)=
taurus [48]
The value of the expression is 38.5
5 0
4 years ago
Read 2 more answers
Refer to the equation 2x − 6y = 12.
Umnica [9.8K]
(-1,3) (0,6) (1,9) (2,12) and (3,15)

The pattern is up 1 over 3
4 0
3 years ago
In order to solve the equation -3x - 6 = 5, the first step is to?
lions [1.4K]

Answer:

Add 6 by both sides

Divide both sides by - 3

4 0
3 years ago
13.) An electrician has a piece of wire that is 3 feet long (36 inches). She needs a piece that is exactly 31.05 inches to fit p
iren [92.7K]

Answer:  4.95 inches

Subtract:  36 - 31.05 = 4.95

Step-by-step explanation:

<em>Whoever created this question hasn't done much real electrical work! </em>

<em>An outlet (also known as a receptacle) usually requires about 4 to 6 inches of wire within the </em><u><em>junction box</em></u><em> to make the connections, depending on what else may be connected in the box. We don't have to measure to 0.05 of an inch. The insulation may have to be stripped precisely to 3/8, 1/2 or 5/8 inch for connections.  </em>

The electrician used 3 feet of cable between junction boxes, and had 8 ¹/₂ inches pulled through the junction box. She needed 4 inches to connect the receptacle. How much the excess did she have to cut off?

Math questions should be realistic.

3 0
3 years ago
Find the probability and interpret the results. if​ convenient, use technology to find the probability. during a certain week th
salantis [7]
From the given question:

\mu=\$2.715 \\  \\ \sigma=\$0.049

The probability of a normally distributed data between two values (a, b) is given by:

P(a\ \textless \ \bar{x}\ \textless \ b)=P\left( \frac{b-\mu}{\sigma/\sqrt{n}} \right)-P\left( \frac{a-\mu}{\sigma/\sqrt{n}} \right)

Thus,

P(\$2.691\ \textless \ \bar{x}\ \textless \ \$2.732)=P\left( \frac{\$2.732-\$2.715}{\$0.049/\sqrt{32}} \right)-P\left( \frac{\$2.691-\$2.715}{\$0.049/\sqrt{32}} \right) \\  \\ =P(1.963)-P(-2.771)=0.97515-0.0028=\bold{0.97235}
8 0
4 years ago
Other questions:
  • 7/12 divided by 3/4 is what?
    8·1 answer
  • Is 12, 13, or 14 a solution of the inequality 4x &gt; 52?
    9·2 answers
  • You can buy 2 DVDs for the same price you would pay for 3 CDs selling for $13.20 a piece.Explain how you could find the price of
    10·1 answer
  • PLEASE HELP!
    5·1 answer
  • The square shown below has a perimeter of 6x-20 units. What is the value of x?
    6·1 answer
  • What is the answer -2p-14=p-4(3+p)
    12·2 answers
  • Ocean sunfishes are well-known for rapidly gaining a lot of weight on a diet based on jellyfish. The relationship between the el
    6·1 answer
  • Im stuck on this question, can someone help:)
    8·1 answer
  • 45+5t=45<br>solving for t​
    7·1 answer
  • Can someone help with this explain the steps pls
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!