All categories

3 years ago

3x − 6y = −12 −x + 2y = 8

Mathematics

2 answers:

AleksandrR [38]3 years ago

4 0

The answer to this question will be x=2

igor_vitrenko [27]3 years ago

3 0

The answer to this question is x=2

You might be interested in

Answerrrrrr mmeeeeeeee ill give you 24 points

Pavel [41]

Answer:

Density = Mass / volume

Problem B mass = 87.5 g and volume = 5 cm^3

Density = 87.5 / 5 = 17.5

This value is too low to be platinum

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

If 3x - 8 = -2, find the value of x - 6.

prisoha [69]

The answer comes out to be X= -2

6 0

3 years ago

What is 21/99 in a decimal form

Norma-Jean [14]

Answer:

0.2121~

Step-by-step explanation:

It's a repeating number. 0.0212121212

7 0

3 years ago

There are 13 animals in a barn. Some are Chickens and some are Pigs. Altogether

konstantin123 [22]

Answer:

Ahh! What a classic: Systems of Equations!

So, if you don't know what a system of equations is, its basically two equations with two variables combined into a system.

So, let x=# of pigs

And also, Let y=# of chickens

Let's make our first equation!

$13=x+y$

This is because there are 13 animals in a barn.

So then, knowing that a pig has 4 legs and a chicken 2:

$40=4x+2y$

This is because there are 40 legs in total, and we multiply the variable because that's how many legs each creature has.

So, here is our system!

$\left \{ {{x+y=13} \atop {4x+2y=40}} \right.$

Through Substitution (the inputting of something instead of a variable):

$x+y=13\\x=13-y$

Then, we input it into the next equation:

$4(13-y)+2y=40\\52-4y+2y=40\\-2y=-12\\y=6$

This means that there are 6 chickens, and by inputting it into the first equation:

$x+6=13\\x=7$

So there you have it!

FYI there are 6 chickens and 7 pigs.

Hope this helps!

P.S. Stay Safe!

8 0

3 years ago

Read 2 more answers

What is the slope intercept form of (4,0) and (0,2)

Shalnov [3]

Answer:

$\huge\boxed{y=-\dfrac{1}{2}x+2}$

Step-by-step explanation:

The slope-intercept form of an equation of a line:

$y=mx+b$

$m$ - slope

$b$ - y-intercept (0, b)

The formula of a slope:

$m=\dfrac{y_2-y_1}{x_2-x_1}$

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

We have two points (4, 0) and (0, 2) → $b=2$

Calculate the slope:

$m=\dfrac{2-0}{0-4}=\dfrac{2}{-4}=-\dfrac{2:2}{4:2}=-\dfrac{1}{2}$

Finally:

$y=-\dfrac{1}{2}x+2$

3 0

2 years ago