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
3241004551 [841]
3 years ago
9

Solves this system of equations by using the elimination method

Mathematics
1 answer:
yuradex [85]3 years ago
8 0
X should equal 6 and y should equal -9
You might be interested in
Natasha has 13 apples some apples are red and some are green she has more red apples than green apples how many red apples and h
shusha [124]
Answers may vary here are all the possible answers:

(R) = red
(G)= green
12 (R) 1 (G)
11 (R) 2 (G)
10 (R) 3 (G)
9 (R) 4 (G)
8 (R) 5 (G)
7 (R) 6 (G)
3 0
3 years ago
Did I get these all right
Leviafan [203]
Yep! They are all right! Great job, could write a bit better.... sorry
3 0
3 years ago
Please help me in this. I need to turn this assignment in!
olga2289 [7]

Answer:

X-----Independent Variable

Y-----Dependent Variable

Dependent Variable-----A variable whose value determines the value of the output

Independent Variable-----A variable whose value determines the value of the input

Input-----The value substituted into an expression or function

Output----The value that results from the substitution of a given input into an expression or function

4 0
2 years ago
Can someone please help me?
larisa86 [58]

We know that a triangle equals 180 degrees in total. We also know one of the angles so we can do 180-84= 96. This means that the other two angles must be equal to 96 degrees. We then set up (x+59)+(x+51)=96 "since both of the angles must add up to 96." Then we add like terms and get 2x+110=96. Further simplification gives us x= -7. Plug this into both angles and you get that angle A is 44 degrees.

8 0
3 years ago
The graph below represents the solution set of which inequality?
natulia [17]

Answer:

option: B (x^2+2x-8) is correct.

Step-by-step explanation:

We are given the solution set as seen from the graph as:

(-4,2)

1)

On solving the first inequality we have:

x^2-2x-8

On using the method of splitting the middle term we have:

x^2-4x+2x-8

⇒  x(x-4)+2(x-4)=0

⇒ (x+2)(x-4)

And we know that the product of two quantities are negative if either one of them is negative so we have two cases:

case 1:

x+2>0 and x-4

i.e. x>-2 and x<4

so we have the region as:

(-2,4)

Case 2:

x+2 and x-4>0

i.e. x<-2 and x>4

Hence, we did not get a common region.

Hence from both the cases we did not get the required region.

Hence, option 1 is incorrect.

2)

We are given the second inequality as:

x^2+2x-8

On using the method of splitting the middle term we have:

x^2+4x-2x-8

⇒ x(x+4)-2(x+4)

⇒ (x-2)(x+4)

And we know that the product of two quantities are negative if either one of them is negative so we have two cases:

case 1:

x-2>0 and x+4

i.e. x>2 and x<-4

Hence, we do not get a common region.

Case 2:

x-2 and x+4>0

i.e. x<2 and x>-4

Hence the common region is (-4,2) which is same as the given option.

Hence, option B is correct.

3)

x^2-2x-8>0

On using the method of splitting the middle term we have:

x^2-4x+2x-8>0

⇒ x(x-4)+2(x-4)>0

⇒ (x-4)(x+2)>0

And we know that the product of two quantities are positive if either both of them are negative or both of them are positive so we have two cases:

Case 1:

x+2>0 and x-4>0

i.e. x>-2 and x>4

Hence, the common region is (4,∞)

Case 2:

x+2 and x-4

i.e. x<-2 and x<4

Hence, the common region is: (-∞,-2)

Hence, from both the cases we did not get the desired answer.

Hence, option C is incorrect.

4)

x^2+2x-8>0

On using the method of splitting the middle term we have:

x^2+4x-2x-8>0

⇒ x(x+4)-2(x+4)>0

⇒ (x-2)(X+4)>0

And we know that the product of two quantities are positive if either both of them are negative or both of them are positive so we have two cases:

Case 1:

x-2 and x+4

i.e. x<2 and x<-4

Hence, the common region is: (-∞,-4)

Case 2:

x-2>0 and x+4>0

i.e. x>2 and x>-4.

Hence, the common region is: (2,∞)

Hence from both the case we do not have the desired region.

Hence, option D is incorrect.




5 0
3 years ago
Other questions:
  • Building a is 190 feet shorter than building
    14·1 answer
  • Is 4 over 16 equal to 0.25
    8·2 answers
  • $20 earns $0.80 in interest. What is the percent interest?
    11·1 answer
  • I need help asap please thank you
    8·2 answers
  • Is -2.7,-9,-30,-100 a geometric sequence ?
    12·1 answer
  • Ashley spent half her weekly allowance playing mini-golf. To earn more money her parents let her wash the car for $9. What is he
    15·1 answer
  • A rectangular tank measures 16 cm by 9 cm by 10 cm. How many milliliters of water are in the tank when it is full? How many lite
    11·1 answer
  • There are 20 boys and 16 girls. what is the largest number of groups that you can form such that boys and girls are distributed
    11·1 answer
  • Ms. Spinosa is also going to the supermarket to buy 10 packs of water bottles, 20 packs of coke. She wants to equally spread the
    15·2 answers
  • What is the first step when rewriting y = –4x2 + 2x – 7 in the form y = a(x – h)2 + k?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!