2 years ago

Solve the following system of equations by elimination

Mathematics

1 answer:

olya-2409 [2.1K]2 years ago

5 0

Answer:

y = -6

x = 1

Step-by-step explanation:

-x + 2y = -13

-x - 2y = 11

Sum the equations:

-x -x = -2x

+2y - 2y = 0

-13 + 11 = -2

then

-2x = -2

x = -2/-2

x = 1

from the first eq.

-x + 2y = -13

-1 + 2y = -13

2y = -13 + 1

2y = -12

y = -12/2

y = -6

check:

from the second eq.

-x -2y = 11

-1 -(2*-6) = 11

-1 -(-12) = 11

-1 + 12 = 11

You might be interested in

Westin is on vacation and wants to purchase something for 350 euro. how much would this cost in us dollars ?

Snezhnost [94]

Answer:

418.69 usd

Step-by-step explanation:

8 0

3 years ago

What is the simplified fraction of 13/24

adoni [48]

$\frac{13}{26}$ divide the numerator and denominator by 13

= $\frac{1}{2}$

8 0

3 years ago

True or false: two points with the same x-coordinate are always on the same vertical line

Vesna [10]

True, you can even test it out yourself. If the domain (x) is the same then it will be a vertical line. Like if you graphed (1,2) (1,4), (1,6) it will be a vertical line on your graph. I hope this helps!

3 0

3 years ago

What is 21/75 simplified sorry guys really bad at this

Romashka [77]

7/25 because you can divide everything. Y 3

8 0

3 years ago

Read 2 more answers

A _________ is a value that describes the center of a data set and includes the mean, median, and mode.

ladessa [460]

A central tendency is a value that describes the center of a data set and includes the mean, median, and mode.

And just in case you don't know:

Mean is the sum of all the numbers divided by how many numbers there are. Basically the average.

Mode is the number that occurs the most times.

Median is the middle number when you write the numbers from lowest to greatest.

4 0

3 years ago

Read 2 more answers

Solve the following system of equations by elimination​

Solve the following system of equations by elimination