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
Andreas93 [3]
3 years ago
12

X + 3y = 18 -X - 4y = -25

Mathematics
2 answers:
Pachacha [2.7K]3 years ago
4 0

Answer:

x = -3

y= 7

Step-by-step explanation:

x + 3y=18 ----(1)

-x - 4y=-25 -----(2)

from equation (1)

x = 18 - 3y ---(3)

putting equation (3) into equation (2)

-(18 - 3y) - 4y = -25

18 + 3y -4y = -25

3y - 4y = -25 - 18

-y = -7

y = 7 ✓

Putting y=7 into equation (1)

x + 3(7) = 18

x + 21 = 18

x = 18 - 21

x = -3 ✓

SVEN [57.7K]3 years ago
3 0
-y=-7
Y=7
-x-4(-7)=-25
-x+28=-25
-x=3
X=-3
You might be interested in
Asap help !!
Lerok [7]

Answer:

put it in a calculator, 8,000 times whatever number u need

5 0
3 years ago
​temperature rose 7° between 9 AM and 2 PM yesterday the temperature at 2 PM was 75 Fahrenheit Wally use the following question
Verdich [7]
The answer is 68 because if it rose between the times it would mean you minus 7 from 75
3 0
3 years ago
PLEASE PLEASE OLEASE HELP ME ASAP I WILL LOVE U FOREVER
vodomira [7]

Answer:

m=3/2

look how many units go up and to the side between 2 points

As seen here, we go up 3 units and over 2 units from (0, -3) to (2, 0.) Therefore, slope is 3/2

Step-by-step explanation:

8 0
3 years ago
Use the elimination to solve this equation. <br><br> 2x+3y=55 <br> 9x+4y=105
seropon [69]
X=5 y=15 (5,15). 
This is how you do it:
-4(2x+3y=55): -8x-12y=-220
3(9x+4y=105):27x+12y=315

You add the two new equations together, canceling out the y values, and get the x value. Then, you go back and plug in the x value in the original equation to get the y value.

6 0
3 years ago
Multiply.Express your answer in standard form.(3 points)(x² -4x + 3)(-3x²+ 7x –1)
bija089 [108]

Answer:

-3x^{4} + 19x^{3} - 38x^{2} + 25x - 3

Step-by-step explanation:

1) distribute x² into (-3x² + 7x - 1) to get: -3x^{4} + 7x³ - x²

2) distribute -4x into (-3x² + 7x - 1) to get: 12x³ - 28x + 4x

3) distribute 3 into (-3x² + 7x - 1) to get: -9x² + 21x - 3

4) combine all the answers together into one equation:

-3x^{4} + 7x³ - x² + 12x³ - 28x² + 4x - 9x² + 21x - 3

5) combine like terms:

7x³ + 12x³ = 19x³

-x² + -28x² + -9x² = -38x²

4x + 21x = 25x

6) combine answers together into one equation:

-3x^{4} + 19x³ - 38x² + 25x - 3

3 0
3 years ago
Other questions:
  • Determine whether the relation is a function: {(–1, –2), (–2, –3), (–3, –1)}
    6·1 answer
  • Plz Help
    14·2 answers
  • Find the values of x and y.<br> (6x +77)°<br> (2y +41)<br> (4x +43)<br> (5y +48)
    5·2 answers
  • Tom compared 2/12 and 7/6 by first comparing each fraction to 1/2 and 1. Step 1: 2/12 is less than 1/2. Step 2: 7/6 is less than
    13·1 answer
  • LAST ONE! PLEASE HELP! WILL MARK BRAINLIEST!
    5·1 answer
  • Please help I am struggling
    14·1 answer
  • The length is 3 inches more than the width period the width is 2 inches more than the height. The volume is 120 in.³. What is th
    5·1 answer
  • On a number line, between which two consecutive whole numbers would square root 27 be located 
    9·2 answers
  • I need help please!!
    12·1 answer
  • Pamela's age is three times Jiri's age. The sum of their ages is 72. What is Jiri's age?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!