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
worty [1.4K]
3 years ago
12

Find the solution of this system of equations. Separate the x- and y-values with a comma. x - 4y = 9 and x - y = -9

Mathematics
1 answer:
Cerrena [4.2K]3 years ago
4 0
X - 4y =  9 ------- (1)
x - y = -9 ---------(2)

(2) - (1):
-y - (-4y) = -9 - 9
-y + 4y = -18
3y = -18
y = -6 . -------- sub into (2)

x - (-6) = -9
x + 6 = -9
x = -9 - 6
x = -15

Ans: x = -15, y = -6

You might be interested in
Trigonometry<br> Special Right Triangles<br> Find the exact value of sec 60* - cosec 30* - sin 0*.
evablogger [386]

Answer:

0

Step-by-step explanation:

cos(60) = ½

sec(60) = 2

sin(30) = ½

cosec(30) = 2

sin(0) = 0

2 - 2 - 0 = 0

8 0
3 years ago
Find the equation of the line perpendicular to the 13x-3y=9 and passing through (-5,0)
aev [14]

9514 1404 393

Answer:

  x +4y = -5

Step-by-step explanation:

The equation of the perpendicular line can be found by swapping the x- and y-coefficients and negating one of them. The new constant can be found by substituting the point values into the equation.

  3x +12y = 3(-5) +12(0)

  3x +12y = -15

We notice that all of the values include a factor of 3. We can divide that out to put the equation in standard form:

  x + 4y = -5

8 0
2 years ago
Let f(x)=3x+5 and g(x)=x^2 find (f-g)(x)
dlinn [17]

Answer:

(f - g)(x) = -x² + 3x + 5

General Formulas and Concepts:

<u>Pre-Algebra</u>

  • Equality Properties

<u>Algebra I</u>

  • Function Notation
  • Combining Like Terms

Step-by-step explanation:

<u>Step 1: Define</u>

f(x) = 3x + 5

g(x) = x²

(f - g)(x) is f(x) - g(x)

<u>Step 2: Find (f - g)(x)</u>

  1. Substitute:                   (f - g)(x) = 3x + 5 - x²
  2. Rewrite:                       (f - g)(x) = -x² + 3x + 5
7 0
2 years ago
What is 30/ 100 plus 50
zhuklara [117]

Answer:

50.3x is the right answer

Step-by-step explanation:

30/100 + 50x = 50.3x

8 0
3 years ago
If 60% of the students prefer waffles to pancakes. If there are 5 students in the class, how many students prefer waffles?
AleksandrR [38]

Answer:

Hm mmm

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Other questions:
  • Solve the quadratic equation by completing the square. −2x2 + 2x + 5 = 0
    6·1 answer
  • A cashier is unsure whether a group of customers ordered and ate a large or a medium pizza. Medium pizzas have a diameter of 12
    5·1 answer
  • If f(x) = 0, what is x?<br><br> 0 only<br> –6 only<br> –2, 1, or 3 only<br> –6, –2, 1, or 3 only
    10·2 answers
  • Help me please. Will name brainliest.
    11·2 answers
  • Which graph represents the function y = 4?<br><br> A) A <br> B) B <br> C) C <br> D) D
    10·1 answer
  • The table shows the number of gallons of gasoline the
    15·1 answer
  • Choose all of the terms that best describe each of the sets of lines or points. Lines AB and CD
    13·1 answer
  • Which graph represents a proportional relationship?
    9·2 answers
  • Multiple choice math question. Question #15
    14·2 answers
  • Please help quickly round to the nearest tenth!
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!