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
AlladinOne [14]
2 years ago
13

SOLVE ALL THESE EQUATION BY USING THE METHOD SUBSTITUTION ALGEBRAICALLY HERE'S ARE ALL THE EQUATION:

Mathematics
1 answer:
pav-90 [236]2 years ago
3 0

Answer:

See below ~

Step-by-step explanation:

<u>Question 1</u>

  • -7x - y = -1
  • y = 8x + 16

⇒ -7x - (8x + 16) = -1

⇒ -7x - 8x - 16 = -1

⇒ -15x = 15

⇒ x = -1

⇒ y = 8(-1) + 16 = 8

⇒ Solution = <u>(-1, 8)</u>

<u></u>

<u>Question 2</u>

  • 3x + 4y = 0
  • y = -3x - 18

⇒ 3x + 4(-3x - 18) = 0

⇒ 3x - 12x - 72 = 0

⇒ -9x = 72

⇒ x = -8

⇒ y = -3(-8) - 18 = 6

⇒ Solution = <u>(-8, 6)</u>

<u>Question 3</u> (not clear)

<u>Question 4</u>

  • -8x - 7y = 0
  • y = 6x

⇒ -8x - 7(6x) = 0

⇒ -8x - 42x = 0

⇒ -50x = 0

⇒ x = 0

⇒ y = 6(0) = 0

⇒ Solution = <u>(0, 0)</u>

<u>Question 8</u>

  • 2x - 6y = -14
  • y = -5x - 19

⇒ 2x - 6(-5x - 19) = -14

⇒ 2x + 30x + 114 = -14

⇒ 32x = -128

⇒ x = -4

⇒ y = -5(-4) - 19 = 1

⇒ Solution = <u>(-4, 1)</u>

You might be interested in
A triangle has an angle that measures 90 degrees what type of triangle could it be​
vekshin1

A triangle that has an angle that measures 90 degrees would be a Right Triangle.

6 0
3 years ago
Read 2 more answers
A random sample of 200 teenagers participated in a taste test. Each teenager sampled four choices of fruit drink (labeled A, B,
Vedmedyk [2.9K]

Answer:

it is c hope it helps have a good day

6 0
3 years ago
For the following figure what’s the value of x?
Leto [7]

Answer:

x = 8 in

y = 8sqrt(2) in

Step-by-step explanation:

x = 8

AC = BC

Because opposite angles are equal.

8² + 8² = hyp²

hyp² = 64 + 64 = 128

hyp = sqrt(128)

hyp = 8sqrt(2)

Where sqrt is the square root

8 0
3 years ago
Can someone help me with this question
valentina_108 [34]
Answer:
B

————-

I’m not 100% sure though
3 0
3 years ago
Read 2 more answers
A family left their house in two cars at the same time. One car traveled an average 7 miles per hour faster than the other. When
Harlamova29_29 [7]
I think it is 15.57.
8 0
3 years ago
Other questions:
  • Identify the vertex for the graph of y = 2x2 + 8x − 3. (2, 21) (2, 17) (−2, −11) (−2, −27)
    7·2 answers
  • 5. &amp; 7. simplify <br> 9. &amp; 11. factor completely
    10·1 answer
  • CHECK MY ANSWER. Geometry. Do not bother answering if you don't know what you're doing. In a 30-60-90 triangle, what is the leng
    15·1 answer
  • Help? Please! very urgent
    15·2 answers
  • If sec ⁡ θ = − 2 secθ=−2 and the reference angle of θ θ is 6 0 ∘ 60 ∘ , find both angles in degrees from 0 ∘ ≤ θ &lt; 36 0 ∘ 0 ∘
    5·1 answer
  • The length of a jogging trail is 3528 m. A jogger wants to complete the trail within 30 min. How many meters must the jogger tra
    10·1 answer
  • Room Design Mr. Nelson is redesigning his living room. He would like to choose a new rug to place in the doorway of the room. Th
    6·1 answer
  • Angela practices piano for 5 hours on Sundays amd for 3 hours on all other days of the week. How many hours doea Angela practice
    7·1 answer
  • EASY MATH CHALLENGE NEED EXPLANATION 20 POINTS The board game Kings crown has, red, green, and gold gems for the players to earn
    9·1 answer
  • Find all positive and negative integers b such that x^2+bx+9 factors.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!