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
Which will result in a perfect square trinomial?
Andru [333]

There no awnser to give if you dont give a pictre or anything?

7 0
3 years ago
does a polygon have at least 3 straight sides and angles or is it a figure with at least three sides?
solmaris [256]
The correct answer is it is a figure with at least 3 straight sides. When you think of a square or a triangle they both have at least 3 sides that are straight. A circle doesn't have any straight sides so it is not a polygon.
You can prove that the other answer is wrong because of two things:
The definition of a polygon is a plane figure with at least three straight sides.
Also, when you think of most shapes what do they all have in common? The have at least three straight sides
5 0
3 years ago
Read 2 more answers
A survey by the state health department found that the average person ate 208 pounds of vegetables last year and 125 5/8 pounds
Trava [24]
I think you would divide
8 0
3 years ago
Find the perimeter of the figure shown to the right.
tia_tia [17]

Step-by-step explanation:

that is very simple. you do understand the word "perimeter" ? it just means the distance when walking around the whole shape once.

and that clearly means to just add all side lengths.

that's it.

so, 25 + 18 + 18 + 20 + 17 = 98 ft

was there any other problem with this you did not understand ?

8 0
2 years ago
Solve 7w = 56, where w is a real number.
steposvetlana [31]

Answer:

w = 8

Step-by-step explanation:

7w = 56

Divide both sides by 7

w = 56/7

w = 8

4 0
3 years ago
Read 2 more answers
Other questions:
  • Of all the people that attend movies 67% are in the 12-29 age group. At one theater, 300 people attended a showing of a certain
    9·1 answer
  • Help me with this please
    13·2 answers
  • Question: “Find the range and interquartile range if the following data”
    13·1 answer
  • Each lap around Steven's block is seven eighths of a mile. If Steven ran six
    10·1 answer
  • Factor the polynomial: 2x(x - 4) + 7 (x - 4)
    5·2 answers
  • Simplify the expression. 55−4⋅5+12 Enter your answer in the box.
    9·2 answers
  • Between what two consecutive integers does √35 lie?
    11·2 answers
  • PLEASE HELP LIKE NOW!!!!!!!!!!!!!!
    7·1 answer
  • As part of the quality-control program for a catalyst manufacturing line, the raw materials (alumina and a binder) are tested fo
    9·1 answer
  • Which three comparisons are correct?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!