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
motikmotik
2 years ago
13

Does anyone know how to Solve the system of equations. ​ ​ −3x+y=2 7x−8y=1

Mathematics
1 answer:
Fantom [35]2 years ago
6 0
You could use the substitution method. in this you’ll solve one equation for one variable. we’ll do the first one for y.
add 3x to both sides, so y = 3x + 2
then add that into the other equation for y.
7x - 8(3x +2) = 1
7x- 24x - 16 = 1
-17x - 16 = 1
-17x = 17
x= -1
now that you know what x is, you can find out y with the equation we made earlier. y = 3x+2
y = 3(-1) + 2
y = -3 + 2
y = -1
You might be interested in
Montrell went to the store to purchase a bag of flamin' hot Cheetos. One bag of chips was $3.39 for 9 oz. What is the unit rate?
castortr0y [4]

Answer:

$0.37  per oz

Step-by-step explanation:

Unit rate

<u>9 oz costs $3.39 and 1 oz of chips cost: </u>

  • $3.39/9 = $0.37  per oz of chips
5 0
3 years ago
Read 2 more answers
A triangle has vertices r(1,2), s(3,3) and t(-3,4)
weqwewe [10]

Give The Rest of the question

7 0
3 years ago
Read 2 more answers
Find the values of a and b.<br> a<br> The diagram is not drawn to scale.<br> a =<br> U<br> b =<br> U
nata0808 [166]

Answer:

a = 36°

b = 144°

Step-by-step explanation:

<h3><u>Method 1</u></h3>

Number of sides = n = 10

Sum of interior angles = (n - 2) × 180°

                                     = (10 - 2) × 180°

                                     = 8 × 180°

                                     = 1440°

Interior angle = b = sum of interior angles ÷ number of sides

                          b = 1440 ÷ 10

                          b = 144°

              a + b = 180° (Sum of angles in the straight line)

         a + 144° = 180°

a + 144° - 144° = 180° - 144°

                    a = 36°

<h3><u>Method 2</u></h3>

Number of sides = 10

Exterior angle = a = 360° ÷ Number of sides

                           a = 360° ÷ 10

                           a = 36°

            a + b = 180° (Sum of angles in the straight line)

        36° + b = 180°

36° + b - 36° = 180° - 36°

                 b = 144°

7 0
2 years ago
Can you all help me pls. Thanks.
Nataliya [291]

Answer:

c

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Help please :( 4^5 x 4^ -7 divide by 4^ -2 ?
alexandr1967 [171]

Answer:

4⁻⁴

Step-by-step explanation:

4⁵ × 4⁻⁷ ÷ 4⁻²

⁺ ⁵ ⁻ ⁷

= ⁻²

⁻ ² ⁻ ²

= ⁻ ⁴

4⁻⁴

7 0
3 years ago
Other questions:
  • I need the answer to the problem
    13·1 answer
  • Record the product 8x43 using expanded form to help
    12·1 answer
  • What is the cost price of an article which when sold at Rs 10260 gives a profit of 20%?
    11·2 answers
  • Brooke has scores of 84, 72, 90, 95, and 87 on her first five quizzes. After taking the sixth quiz, Brooke’s mean score increase
    9·1 answer
  • Plzzzzz help i really need it guys thxxxxxxxx!
    5·1 answer
  • What is the function equation and unit rate for this graph?? Help me out! Please!
    10·1 answer
  • What is 2/3 divided by 2
    6·1 answer
  • Select the correct answer. Consider these three numbers written in scientific notation: 6. 5 × 103, 5. 5 × 105, and 1. 1 × 103.
    6·1 answer
  • The following statements are all incorrect. Explain the statements and the errors fully using the probability rules discussed in
    9·2 answers
  • Differentiate the equation to find the functions for <br> Velocity v= ds/dt
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!