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
masya89 [10]
3 years ago
10

Solve by multiplication and addition. Show each step of your work. 2x – 3y = 18 4x + y = 8 Please help me!!!! I am giving 50 poi

nts!
Mathematics
2 answers:
ivanzaharov [21]3 years ago
8 0

Answer:

(x, y ) = (3 , - 4 )

Step-by-step explanation:

given the 2 equations

2x - 3y = 18 → (1)

4x + y = 8 → (2)

multiply (2) by 3

12x + 3y = 24 → (3)

add (1) and (3) term by term to eliminate the term in y

(2x + 12x) + (- 3y + 3y) = (18 + 24)

14x = 42 ( divide both sides by 14 )

x = 3

substitute x = 3 in (1) or (2) to evaluate for y-coordinate

(2) → 12 + y = 8 ⇒ y = 8 - 12 = - 4

solution is (3, - 4 )


motikmotik3 years ago
6 0
2x - 3y = 18
4x + y = 8
/*multiply first eqtn by -2

-4x + 6y = -36
4x + y = 8
/*add the eqtns

-4x + 6y + 4x + y = -36 + 8
7y = -28
y = -4

Plug in the y value into either of the first two eqtns:

2x - 3*(-4) = 18
2x +12 = 18
2x = 18 - 12
2x = 6
x = 3

(x,y)=(3,-4)
You might be interested in
. Simplify an expression for the area of the rectangle shown above
mel-nik [20]
8x+3x5=66 there you go
3 0
3 years ago
BRAINLIEST! As a dolphin swims along the side of a cruise ship, he jumps to a height of seven meters above the water surface and
Yuliya22 [10]

PLS! MARK ME AS A BRAILIEST......

6 0
3 years ago
You collect the following data for explanatory variable A and response variable B:
wolverine [178]

Answer:

v

Step-by-step explanation:

5 0
3 years ago
Given; D is the Midpoint of CE / Prove DE =1/2CE
aleksley [76]

Answer:

Check explanation

Step-by-step explanation:

Here, we want to make a prove;

Mathematically , since D is the midpoint of CE

Then;

CE = CD + DE

Also, since D splits the line segment into two equal parts as the midpoint, then CD must be equal to DE

I.e CD = DE

Hence, we can express CE as follows;

CE = DE + DE

CE = 2 DE

Divide both sides by 2

CE/2 = DE

Hence; DE = 1/2 CE

6 0
3 years ago
Please help. Answer only if you know the correct answer. I’ll mark you as brainliest if correct.
Allisa [31]

Answer:

  37.2 mph

Step-by-step explanation:

They are going 0.60 times the speed that converts to 62 mph. Their speed is approximately ...

  0.60 × 62 mph = 37.2 mph

4 0
3 years ago
Other questions:
  • Angel ate 2/3 of the chicken wings that were on the platter. How many chicken wings were on the platter if he ate 8 wings?
    15·1 answer
  • Complete computefibonacci() to return fn, where f0 is 0, f1 is 1, f2 is 1, f3 is 2, f4 is 3, and continuing: fn is fn-1 + fn-2.
    7·1 answer
  • How many 7/8 yard long scarves can I make from 156 feet of fabric
    13·1 answer
  • I don't understand this, I need help so I can help my daughter
    11·1 answer
  • Draw and LABEL a picture to show how knowing 7+7 help you find 7+8
    15·1 answer
  • A batch of 24 cookies has a total of 3200 calories.How many calories is each cookie
    8·2 answers
  • What is twice of 2^30 using exponents
    8·1 answer
  • 1. Rename 4/7 as a percent. Round to the nearest tenth of a percent if necessary
    15·2 answers
  • How do you put 3/4% ,3/25%, and 11/20% as a decimal
    5·1 answer
  • Find what 2/4 is multipled by to to get 2/4 divided by 12. Then solve the problem. Do not reduce your answer.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!