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
geniusboy [140]
3 years ago
11

WILL MARK BRAINLIEST! PLZ HELP ASAP;;;

Mathematics
1 answer:
tatiyna3 years ago
6 0

Answer:

  (x, y) = (5, 7)

Step-by-step explanation:

It can be useful to put these equations into standard form, with mutually-prime coefficients and a positive x-coefficient.

  10x +y -(4x +4y) = 9 . . . . . subtract the variable terms on the right

  6x -3y = 9  . . .  simplify

  2x -y = 3 . . . . . divide by 3 to put in standard form

__

  (x +10y) -(10x +y) = 18 . . . . . subtract the variable terms on the right

  -9x +9y = 18  . . .  simplify

  x -y = -2 . . . . . . . divide by -9 to put in standard form

__

Now, we can subtract the second equation from the first.

  (2x -y) -(x -y) = 3 -(-2)

  x = 5

  y = x+2 = 7 . . . from the second simplified equation

The solution is (x, y) = (5, 7).

You might be interested in
Plzzz help !!
irga5000 [103]

Answer: 14 tons and $3,860.50

Step-by-step explanation:

4 0
2 years ago
7. All of the following are perfect square trinomials EXCEPT one. Which is it?
wolverine [178]

Answer:

All answers EXCEPT answer C. are perfect square trinomials.

Step-by-step explanation:

A perfect square trinomial is polynomial that satisfies the following condition:

(a+b)^{2} = a^{2}+2\cdot a \cdot b + b^{2}, \forall\,a,b\in\mathbb{R}

Let prove if each option observe this:

a) 4\cdot x^{2} + 12\cdot x\cdot y + 9\cdot y^{2}

1) 4\cdot x^{2} + 12\cdot x\cdot y + 9\cdot y^{2} Given

2) (2\cdot x)^{2}+ 2\cdot (2\cdot x)\cdot (3\cdot y)+(3\cdot y)^{2} Definition of power/Distributive, associative and commutative properties.

3) a = 2\cdot x, b = 3\cdot y Definition of perfect square trinomial/Result.

b) 9\cdot a^{2}-36\cdot a + 36

1) 9\cdot a^{2}-36\cdot a + 36 Given.

2) (3\cdot a)^{2}-2\cdot (3\cdot a)\cdot 6 + 6^{2} Definition of power/Distributive, associative and commutative properties.

3) a = 3\cdot a, b = 6 Definition of perfect square trinomial/Result.

c) x\cdot y^{2}-4\cdot x^{2}\cdot y^{2}+4\cdot x^{2}\cdot y^{2}

1) x\cdot y^{2}-4\cdot x^{2}\cdot y^{2}+4\cdot x^{2}\cdot y^{2} Given

2) x\cdot y\cdot (1-4\cdot x+4\cdot x) Distributive property.

3) x\cdot y \cdot 1 Existence of the additive inverse/Modulative property.

4) x\cdot y Modulative property/Result.

d) a^{2}\cdot b^{2}+4\cdot a^{3}\cdot b + 4\cdot a^{4}

1) a^{2}\cdot b^{2}+4\cdot a^{3}\cdot b + 4\cdot a^{4} Given

2) (a\cdot b)^{2}+2\cdot (a\cdot b)\cdot (2\cdot a^{2})+(2\cdot a^{2}) Definition of power/Distributive, associative and commutative properties.

3) a = a\cdot b, b = 2\cdot a^{2} Definition of perfect square trinomial.

All answers EXCEPT answer C. are perfect square trinomials.

8 0
3 years ago
PLEASE HURRY WILL GIVE BRAINLIST ​
AleksandrR [38]

Answer:b2254

Step-by-step explanation:

3 0
2 years ago
Read 2 more answers
How do I solve this equation?
Keith_Richards [23]

Answer:

y=\frac{7}{2}x+11

Step-by-step explanation:

To solve, we need to find the y-intercept (b). In order to find the y-intercept, we can plug in the slope and the (x,y) coordinate pair given to us into the equation to solve for the y-intercept:

y=mx+b

4=(-7/-2)*-2+b

4=14/-2+b

4=-7+b

Add 7 to both sides

b=11

Therefore the equation is:

y=\frac{7}{2}x+11 (note that the fraction is positive since the two negatives cancel out)

4 0
2 years ago
- A1 Plumbing Service charges $35 per hour plus a $25
Alja [10]

Answer: 5 hours

Step-by-step explanation: c=35•h+25

25=40•h-35•h; 25=5•h

3 0
3 years ago
Other questions:
  • What is the quotient of (x^3+3x^2-4x-12) / (x^2+5x+6)?
    9·1 answer
  • State how many imaginary and real zeros the function has. f(x) = x5 + 7x4 + 2x3 + 14x2 + x + 7
    15·1 answer
  • Please please please help me I need to get this right so please don’t do that if you don’t know geometry
    10·1 answer
  • Will give brainliest!!!!
    12·2 answers
  • HELP PLS!!!
    15·1 answer
  • In the linear equation y = -6x - 4, the y-intercept is:<br>-6<br>6<br>-4<br>4​
    12·1 answer
  • Maura drew a scale drawing of an apartment. She used the scale 1 centimeter : 2 meters. In the drawing, the living room is 3 cen
    12·2 answers
  • Solve for<br> Help me please
    10·1 answer
  • Help Please One Mixed Fraction<br><br> 1/2 x 1 4/9
    6·2 answers
  • Answer the Venn diagram based question, I will make uh brainliest +50 points.​
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!