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
strojnjashka [21]
2 years ago
11

Please hurry show your work please Solve using elimination (IXL Skill ZQV). Show all your work.

Mathematics
1 answer:
Colt1911 [192]2 years ago
3 0

Answer:

x=5, y=-6, or (5, -6)

Step-by-step explanation:

Hi there!
We are given the following system of equations:
6x + 3y =12
-2x-5y=20

And we want to solve it by elimination, where we will add the equations together, clear one of the variables, solve for the other variable, and then use the value of the solved variable to find the value of the first variable, that was cleared earlier

Before we clear a variable, we want the values of the coefficients to have opposite signs; for example, if we wanted to clear x in these equations, we would want the coefficients of x in both equations to be 2 and -2, or 6 and -6

In order to get the coefficients to have opposite signs, we can multiply or divide the equations by any numbers to get to the desired coefficients

For this solution, let's clear x, but you can choose to clear y if you wish; right now, the coefficients of x are 6 and -2

If we divide both sides of the first equation by 3, the equation will become 2x + y = 4, which if we add that to -2x-5y=20, we'll clear x and only have y left

In that case, take 6x + 3y =12 and divide both sides by 3

6x+3y=12

÷3        ÷3

________

2x + y = 4

Now add 2x + y =4 with -2x - 5y = 20; notice how the 2x and the -2x cancel out:

2x + y = 4

-2x-5y=20
________
0x - 4y =24

-4y=24

Divide both sides by -4

y=-6
We now have the value of y
Now we need to find the value of x

We can substitute -6 as y into either one of the equations (6x + 3y = 12 OR -2x - 5y =20) to solve for x

Let's take 6x + 3y = 12 for example
Substitute -6 as y into the equation:
6x + 3(-6) = 12

Multiply

6x - 18 = 12

Add 18 to both sides

6x = 30
Divide both sides by 6

x=5

The solution is x=5, y=-6, or as a coordinate point, (5, -6)
Hope this helps!

Want to see another example of these types of problems? Try this question! brainly.com/question/24785499

You might be interested in
it rained nine days in the month of april .based on this ,what is the probaility that is does not rain on the first day of may?​
attashe74 [19]
<h3>Answer:     7/10</h3>

==========================================================

Explanation:

There are 30 days in April. Since it rained 9 of those days, the empirical probability of it raining in April is 9/30 = (3*3)/(3*10) = 3/10.

If we assume that the same conditions (ie weather patterns) hold for May, then the empirical probability of it raining in May is also 3/10. By "raining in May", I mean specifically raining on a certain day of that month.

The empirical probability of it not raining on the first of May is therefore...

1 - (probability it rains)

1 - (3/10)

(10/10) - (3/10)

(10-3)/10

7/10

We can think of it like if we had a 10 day period, and 3 of those days it rains while the remaining 7 it does not rain.

6 0
3 years ago
Both the football and volleyball teams have games today. The football team plays every 7 days. The volleyball team plays every 3
Allisa [31]
They will have games on the same day in 21 days
6 0
3 years ago
How do you do this question?
vaieri [72.5K]

Answer:

(-∞, -2), (-2, -0.618), and (1.618, 3)

Step-by-step explanation:

The red plus (+) signs indicate the regions in which the function is concave up, and the red negative (-) signs indicate the regions in which the function is concave down.

Note that the sign of the concavity changes at an inflection point.

Let's examine the intervals given.

(-∞, -2): Yes, concave up.

(-∞, -1.17): No. Concave up in (-∞, -2) but concave down in (-2, -1.17).

(-2, 0): No. Concave down in (-2, -1.17) but increasing in (-1.17, 0.0).

(-1.17, 0.689): Yes. Concave up.

(-0.618, 1.618): No. Concave up in (-0.618, 0.689) but concave down in (0.689, 1.618).

(0, 3): No. Concave up in (0, 0.689), concave down in (0.689, 2.481), and concave up in (2.481, 3).

(2.481, ∞): Yes. Concave up.

The three intervals that are concave up are (-∞, -2), (-1.17, -0.689), and (2.481, ∞).

4 0
3 years ago
Help! problem:<br>5-x=11+x
snow_tiger [21]
The answer is x=-3

5-x=11+x
-11  -11             First subtract 11
-6-x=x          
+x  +x                Now add x to both sides
-6=2x 
~2 ~2                 Finally divide by 2
-3=x                   Your answer is x=-3

7 0
3 years ago
I need help, I don't know how to do it.
Sindrei [870]

Answer:

Step-by-step explanation:

to solve this problem we can use the Pythagorean theorem

UT and TL are the legs, while LU is the hypotenuse

We have to find LU so we can proceed like this

x^2 + (x+1)^2 = LU^2

x^2 + x^2 + 1 + 2x = LU^2

2x^2 + 2x + 1 = LU^2

LU = +/- \sqrt{2x^2+2x+1

we have to take only the positive value because a length can’t be negative.

2x^2 + 2x + 1 is positive for every value of x, so the final answer is

\sqrt{2x^2+2x+1}

5 0
2 years ago
Other questions:
  • These temperatures were recorded in International Falls, Minnesota, on four consecutive days: day 1: -10°F day 2: -13°F day 3: -
    12·1 answer
  • Parallelogram ABCD has vertices: A(-3, 1), B(3, 3), C(4, 0), and D(-2, -2). In two or more complete sentences, explain how you c
    13·2 answers
  • A random sample of 12 graduates of a certain secretarial school typed an average of 79.3 words per minute with a standard deviat
    6·1 answer
  • Answer this please!! Help me !!
    11·1 answer
  • Please help !!!!!!!!!!!!!!!!!!!!!!!
    12·1 answer
  • Y is more than half of x
    12·1 answer
  • Helpppppppppppppppppppppppppp
    14·2 answers
  • What is the volume of a hemisphere with a radius of 4.3 cm, rounded to the nearest tenth of a cubic centimeter?
    5·1 answer
  • What is the sum of the arithmetic sequence 8,15,22..., if there are 26 terms?
    6·1 answer
  • 3. Which number is not written in scientific notation? A. 1.12 x 10^13 B. 1.45 x 9^8 C. 1.47 x 10^-10​
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!