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
Dominik [7]
2 years ago
14

3x+2y= -19 solve by elimination of addition -3x-5y= 25

Mathematics
2 answers:
tensa zangetsu [6.8K]2 years ago
8 0

Answer:

x=-5, y=-2

Step-by-step explanation:

3x+2y= -19  

-3x-5y= 25

Add the two equations together

3x+2y= -19  

-3x-5y= 25

------------------

0x -3y = 6

Divide each side by -3

-3y/-3 = 6/-3

y = -2

Now find x

3x+2y = -19

3x +2(-2) =-19

3x-4 = -19

Add 4 to each side

3x -4+4 = -19+4

3x= -15

divide by 3

3x/3 = -15/3

x = -5

solong [7]2 years ago
5 0

Answer:

x = -5, y = -2

Step-by-step explanation:

3x + 2y = -19

-3x - 5y = 25

Add both equation together.

  • 3x + 2y = -19
  • <u>+ -3x - 5y = 25</u>
  • <u> 0 x -3y = 6</u>
  • -3y = 6

Divide each side by -3.

  • -3y/-3 = 6/-3
  • y = -2

Now, find x.

Substitute the value of y into the equation 3x + 2y = -19

  • 3x + 2( -2 ) = -19
  • 3x <u>- 4</u> = - 19

Move the constant to the right hand side and change their sign.

  • 3x = -19 + 4
  • 3x = -15

Divide both side by 3.

  • 3x / 3 = -15 / 3
  • x = -5

Therefore, x = -5 and y = -2

You might be interested in
Iq scores are normally distributed with a mean of 100 and a standard deviation of 15 what is the probability that a randomly sel
a_sh-v [17]
So we are given the mean and the s.d.. The mean is 100 and the sd is 15 and we are trying the select a random person who has an I.Q. of over 126. So our first step is to use our z-score equation:

z = x - mean/s.d.

where x is our I.Q. we are looking for

So we plug in our numbers and we get:

126-100/15 = 1.73333

Next we look at our z-score table for our P-value and I got 0.9582

Since we are looking for a person who has an I.Q. higher than 126, we do 1 - P. So we get

1 - 0.9582 = 0.0418

Since they are asking for the probability, we multiply our P-value by 100, and we get 

0.0418 * 100 = 4.18%

And our answer is

4.18% that a randomly selected person has an I.Q. above 126
Hopes this helps!
6 0
3 years ago
What is the sum of the difference?
Alona [7]

Answer:

A. 9x^4 and 3x^5y

Step-by-step explanation:

there are two ways to solve this:

first way:

You can solve this my substituting numbers for x and y in this case i used 2 for x and 3 for y and see which one is equal to the original equations

the second way is the regular way

when you add or subtract numbers with variables and exponents you want to add the constants and add the exponents in this case 5x^{4} +4x^2 is the same as (5x+4x)^(4+4) = 9x^4and you can do the same process for subtraction

12x^{5}y-9x^5 y\\(12x-9x)^(5+5)*y= 3x^5y

8 0
3 years ago
I need on help on this!
ElenaW [278]

The probability that the marble taken out is yellow is 1/4

Step-by-step explanation:

Total marbles = 12

Yellow marbles = 3

Probability that the marble taken out is yellow= No of yellow marbles/total marbles.

Probability that the marble taken out is yellow= 3/12

Probability that the marble taken out is yellow= 1/4

So, the Probability that the marble taken out is yellow is 1/4

Keywords: Probability

Learn more about Probability at:

  • brainly.com/question/4021035
  • brainly.com/question/4655616
  • brainly.com/question/6649771

#learnwithBrainly

7 0
3 years ago
Which of the following sets could not be the lengths of the sides of a triangle?
frez [133]
-(11,14,25) is the correct answer. the two shorter sides must add to a longer distance than the longest side.

8 0
2 years ago
Elena went to a store where you can scoop your own popcorn and buy as much as you want. She bought 10 ounces of spicy popcorn fo
kramer

Answer:

1 ounce costs 0.25$

Step-by-step explanation:

I have no idea what the question is as there is no question but that's the answer for what I think you wanted to know

6 0
2 years ago
Other questions:
  • 4. Find each quotient. a.18/-3 b.-5/-1 c.24/-6 d.-10/-1 e.-25/5 f.8/-2
    15·1 answer
  • I am very stupid, can someone help me out on this one?
    8·2 answers
  • I need help solving this and getting the right answer. I got the answers 3.7854 changed to 3.79, and another answer which is 3.7
    12·2 answers
  • How do i write a number in standerd form
    13·2 answers
  • -7÷x=19<br><br>need your help​
    15·1 answer
  • The area of a square room is 16x^2+72x+81. what is the length of one side of the room
    10·1 answer
  • Can someone do this? it based on angles so yea thank&lt;3 giving a lot of points so don't make this go to waste
    15·1 answer
  • Plz help thanks I really appreciate it
    6·2 answers
  • PLEASE HELPPP <br><br> AKA JASMINE IS THE BEST PUR<br> will give brainliest
    13·1 answer
  • Avery owns a small business selling ice-cream. She knows that in the last week 6
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!