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
Varvara68 [4.7K]
3 years ago
6

Y = -3x - 2 and 5x + 2y = 15

Mathematics
1 answer:
denis-greek [22]3 years ago
8 0

Answer:

(-19, 55)

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

<u>Algebra I</u>

  • Solving systems of equations using substitution/elimination

Step-by-step explanation:

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

y = -3x - 2

5x + 2y = 15

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

<em>Substitution</em>

  1. Substitute in <em>y</em>:                     5x + 2(-3x - 2) = 15
  2. Distribute 2:                          5x - 6x - 4 = 15
  3. Combine like terms:            -x - 4 = 15
  4. Isolate <em>x</em> term:                      -x = 19
  5. Isolate <em>x</em>:                               x = -19

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

  1. Define original equation:                    y = -3x - 2
  2. Substitute in <em>x</em>:                                     y = -3(-19) - 2
  3. Multiply:                                                y = 57 - 2
  4. Subtract:                                               y = 55
You might be interested in
Evaluate: Percents Benita answered 85% of the test questions correctly. If she answered 9 questions incorrectly, how many questi
madreJ [45]

Answer:

60

Step-by-step explanation:

3 0
2 years ago
PLEASE HELP ME WITH THIS QUESTION I AM OFFERING A LOT OF POINTS BUT I HAVE NO IDEA WHAT THIS QUESTION IS!!!!!!
Aloiza [94]

Answer: I think b

Step-by-step explanation: I had the same question

5 0
3 years ago
What is the surface area of this cube? <br><br> YEET
Katyanochek1 [597]
Hello!

To find the surface area of a cube you use the equation

6  a^{2}

a is a side length

Put in the values you know

6 * 11^{2}

Square the number

6 * 121 = 726

The answer is 726cm^{2}

Hope this helps!
6 0
3 years ago
Read 2 more answers
If two thirds of a number decreased by 20 is 40, what is the number
oee [108]

Answer:

The unknown number is 90

Step-by-step explanation:

This question requires a good understanding so as to interprets it well

And always ensure that all symbols used in representation are well stated so as to help the examiner or anyone who will mark it to understand better

So back to the question,let the unknown number be x

And two thirds of the unknown number is 2/3x

2/3x was decreased by 20 which can be written as 2/3x-20

And this decrease gives 40

That's,2/3x-20=40

Then go ahead to solve the question

Start by finding the LCM and the LCM is 3

2x-60/3=40

Cross multiply

2x-60=40×3

2x-60=120

Collect like terms by adding 60 to both sides

2x=180

Divide both sides by 2

x=90

Therefore the final answer is 90

8 0
3 years ago
What is the third angle of a right triangle if one of the angles measures 51.
Elodia [21]

Answer:

39

Step-by-step explanation:

The short answer is 39.

Every triangle has 180 degrees. There are no exceptions to this rule.

Since a triangle has 3 angles, all three together must add up to 180o

A right angle = 90 degrees always.

You are given 51 degrees as your second angle

The third one is x

x + 51 + 90 = 180                   Total of three angles must be 180

x + 141 = 180                           The left has been added to give 141

x = 180 - 141                            Subtract 141 from both sides

x = 39                                     The third angle = 39    

3 0
3 years ago
Other questions:
  • In a petri dish, a certain type of bacterium doubles in number every 40 minutes.
    12·1 answer
  • Write the value of c that makes x^2+12x+c a perfect square trinomial.
    9·1 answer
  • Jayden has put $35,000 into a retirement fund. The fund has an estimated annual return of 5%. If Jayden doesn't add any more mon
    11·1 answer
  • Write the word COURAGEOUS on paper in large letters, cut out each
    5·1 answer
  • What is a factor of 16 but not a multiple of 4
    10·2 answers
  • (x^5-y^5) divided (x-y)
    10·1 answer
  • A triangle has side lengths of (8b – 10c) centimeters, (8b – 4d) centimeters, and
    11·2 answers
  • Given the figure below, find the values of x and z
    7·1 answer
  • Need help with a math problem If doing 5 stars and a good rating
    5·1 answer
  • Which of the Following illustrates how to find the difference of <br> 12a ^2b and —5a^2b?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!