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
Agata [3.3K]
3 years ago
11

Explain how to solve a system of three equations using the elimination method.

Mathematics
1 answer:
kotykmax [81]3 years ago
5 0

You can solve a system of three equations by multiplying each equation by a number that allows you to add or suvtract the same equation together by eliminating the x or y variable

You might be interested in
Please answer this, due today!!! - First correct answer becomes brainliest
LiRa [457]

Answer:

x+2y=-1

-×+3y=-19

5y=-20

y=-20/5

y=-4

x=0

7 0
3 years ago
Multiply Mixed Numbers lesson 7.9
lord [1]
1- 2
2- 5
3- 4.37 or just put 4.3
4 0
3 years ago
Read 2 more answers
A coordinate grid is placed over a map and every unit represents 1 mi. The point at (3, 8) represents the location of the baseba
alexira [117]
The distance between 2 points ( x_{1}, y_{1}) and ( x_{2}, y_{2}) on the coordinate plane is \sqrt{(x_{2}-x_{1})^2-(y_{2}-y_{1})^2}
So the distance between the given points is \sqrt{(7-3)^2+(-2-8})^2}= \sqrt{4^2+(-10)^2}= \sqrt{16+100}=  \sqrt{116}=10.8
As every unit is 1 mile, so the distance should be 10.8*1=10.8miles.

Hope this helps.
3 0
4 years ago
HELP!!! I WILL GIVE BRAINLIEST!!! 10 PTS!!!
tatiyna

Answer:

x= 55 degrees

w = 5

Step-by-step explanation:

Triangle PQR contains two triangles, QPS and PSR.

Looking at triangle QPS, it is an isosceles triangle. This is shown by the two short lines that cuts line QP and line QS.

In an isosceles triangle, two sides and two angles are equal. The two equal angles are the base angles.

Therefore,

angle P and angle S are equal. Also

Line QP and line PS are equal. This means

6w - 10 = w

6w-w = 10

5w = 10

w = 10/2 = 5

Angle Q + 100 degrees = 180 ( sum of angles on a straight line)

Angle Q = 180 - 100 = 80 degrees

Angle Q = Angle S(base angles of an isosceles triangle)

Angle PSR = 180 - 80 = 100 degrees( sum of angles on a straight line is 180)

Angle PSR + x + 25 = 180

x = 180 - 25 - 100 = 55 degrees

6 0
3 years ago
When it is operating properly, a chemical plant has a daily production rate that is normally distributed with a mean of 885 tons
-BARSIC- [3]

Answer:

<em>The test statistic Z = 1.844 < 1.96 at 0.05 level of significance</em>

<em>Null hypothesis is accepted </em>

<em>Yes he is right</em>

<em>The manager claims that at least 95 % probability that the plant is operating properly</em>

Step-by-step explanation:

<u>Explanation</u>:-

Given data Population mean

                                           μ     = 885 tons /day

Given random sample size

                                          n = 60

mean of the sample

                                        x⁻  = 875 tons/day

The standard deviation of the Population

                                      σ = 42 tons/day

<em><u>Null hypothesis</u></em><em>:- H₀: </em>The manager claims that at least 95 % probability that the plant is operating properly

<u><em>Alternative Hypothesis :H₁</em></u>: The manager do not claims that at least 95 % probability that the plant is operating properly

<em>Level of significance</em> =  0.05

The test statistic

 Z = \frac{x^{-} -mean}{\frac{S.D}{\sqrt{n} } }

Z = \frac{875 -885}{\frac{42}{\sqrt{60} } }

Z = \frac{-10}{5.422} = -1.844

|Z| = |-1.844| = 1.844

<em>The tabulated value</em>

<em>                          </em>Z_{\frac{0.05}{2} } = Z_{0.025} = 1.96<em></em>

<em>The calculated value Z = 1.844 < 1.96 at 0.05 level of significance</em>

<em>Null hypothesis is accepted </em>

<u><em>Conclusion</em></u><em>:-</em>

<em>The manager claims that at least 95 % probability that the plant is operating properly</em>

<em></em>

<em></em>

8 0
3 years ago
Other questions:
  • A company wants to develop audio speakers using an inexpensive type of plastic that has a very high quality of sound output. Whi
    8·1 answer
  • You pay $1 to rent a movie plus an additional $0.50 per day until you return the movie. Your friend pays $1.25 per day to rent a
    9·2 answers
  • What is dy/dx if y = (x2 + 2)3(x3 + 3)2? A. 3(x2 + 2)2(x3 + 3)2 + 2(x2 + 2)2(x3 + 3) B. 2x(x3 + 3)2 + 3x2(x2 + 2)3 C. 6x(x2 + 2)
    12·1 answer
  • HELP, PLZ FAST WILL GIVE BRAINLIEST ANSWER!!!!!!!!!!!!!!!!
    13·2 answers
  • PLZ HELP ASAP GEOMETRY
    5·2 answers
  • What percent of 200 is 40?<br>a. 200%<br>b. 20%<br>c. 2%​
    9·2 answers
  • Pls help me<br> 4x-2y=14<br> y=1/2x-1
    6·1 answer
  • Help meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
    14·1 answer
  • Please help with math (30 points)
    8·1 answer
  • Help meeeeeeeeeeeeeeeeeeeeeeeeeeeee pleaseeeeeeeeeeeeee
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!