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
alisha [4.7K]
3 years ago
7

How do I do this problem with solution by elimination? 2x+y=3 -2x+5y=-9

Mathematics
1 answer:
ddd [48]3 years ago
7 0

Answer:

(2, -1)

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right

Equality Properties

  • Multiplication Property of Equality
  • Division Property of Equality
  • Addition Property of Equality
  • Subtract Property of Equality

<u>Algebra I</u>

  • Solving systems of equations using substitution/elimination

Step-by-step explanation:

<u>Step 1: Define Systems</u>

2x + y = 3

-2x + 5y = -9

<u>Step 2: Solve for </u><em><u>y</u></em>

<em>Elimination</em>

  1. Combine equations:                    6y = -6
  2. Divide 6 on both sides:               y = -1

<u>Step 3: Solve for </u><em><u>x</u></em>

  1. Define equation:                    2x + y = 3
  2. Substitute in <em>y</em>:                       2x - 1 = 3
  3. Isolate <em>y</em> term:                        2x = 4
  4. Isolate <em>y</em>:                                 x = 2
You might be interested in
I need help with this question on my homework, please help me.
Darina [25.2K]
100%-59%-=41%
41% divided by 94=0.44
59% divided by 6=9.83
9.83 divided by 0.44= 22.34. One of these 6 people would be 22.34 times as wealthy as one of these other 94 people.
3 0
3 years ago
Construct an inscribed circle in triangle PQR by finding the incenter of the triangle.
hodyreva [135]

Answer:

Check it below

Step-by-step explanation:

Hello!

By definition, the intercept of the 3 bisectors, within a triangle is the Incenter. So let's get started, by tracing three bisectors.

In the triangle PQR::

  1. Use a compass, open its legs with a little more than half of \overline{PQ}  . Place the needle point in the vertex of P. Mark!
  2. Do the same, placing the needle point in Q, following \overline{QP} direction. Mark
  3. Repeat it with the other triangle's line segment, namely:

\overline {QR},\:\overline{PR}

   4.Trace with a ruler, from each intersection point a line. You'll trace three lines then.

    5. Place the compass' needle point in this intersection point, (inside the triangle) with a hinge up to the triangle side, draw the circle inscribed.

 

7 0
3 years ago
Determine the greatest common factor of 15xy^7z and 30x^2y^7z
yawa3891 [41]

Answer:

15x {y}^{7} z

Step-by-step explanation:

<h3>Factorize the Expressions</h3>

15x {y}^{2} z = 3 \times 5 \times x \times y \times y \times y \times y \times y \times y \times y \times z

30 {x}^{2}  {y}^{7} z = 2 \times 3 \times 5 \times x \times x \times y \times y \times y \times y \times y \times y \times y \times z

<h3>Factor out the Common Factors</h3>

gcf = 3 \times 5 \times x \times y \times y \times y \times y \times y \times y \times y \times z

<h3>Multiply the Common Factors</h3>

3 \times 5 \times x \times y \times y \times y \times y \times y \times y \times y \times z = 15x {y}^{7} z

The Factored expressions are

15x {y}^{7} z

And

15x {y}^{7} (2x)

5 0
3 years ago
PLEASE PLEASE HELP!!!!
kow [346]

Answer:

4

Step-by-step explanation:

8 0
2 years ago
use the distributive property to remove parentheses. Simplify your answer as much as possible. 1/2(4y+7)
Anna007 [38]
1/2(4y+7)

Use the distributive property. a(b+c)= ab+ac 

1/2*4y= 2y

1/2*7= 3.5

2y+3.5 <---- simplified expression

I hope this helps!
~kaikers


7 0
3 years ago
Read 2 more answers
Other questions:
  • What does 420+39+1000=
    14·1 answer
  • What is the GCF of 15 and 57?
    9·2 answers
  • Write 144 with an exponent by using 12 as the data base.
    12·1 answer
  • HELP GRACIAS<br><br> does this equation have one,zero,infinite solution? <br> 9(x-3)+21=9x-6
    11·1 answer
  • Evaluate 10x+18 when x=5
    8·1 answer
  • i need help with 3 (along with 3a-c) i am confused on what to do with the numbers that are in degrees...
    13·2 answers
  • What is 3 divided by 5 5/8
    12·2 answers
  • Can someone help with this please
    13·2 answers
  • Solve the following inequality: |3x|&gt;x+20
    11·1 answer
  • The mean of Fred’s grades on five tests was 75.2. The grades on the first 4 of these tests were 87, 84, 88, and 45. Find the gra
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!