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Lisa [10]
3 years ago
15

-4x+3y=-4 x-2y = 1 +this is substitution I really need help​

Mathematics
1 answer:
lianna [129]3 years ago
8 0

Answer:

x = 1

y = 0

Step-by-step explanation:

You did a great job solving one of the equations for a single variable. You solved for x. But what your paper shows is that...it jind of looks like you were going to substitute the 2y+1 into y. BUT you need to substitute it into x.

-4x + 3y = -4

x = 2y + 1

Fill in 2y + 1 into x in the first equation.

-4(2y+1) + 3y = -4

Now you have an equation in one variable. There are only y's in this equation. Next, distribute.

-8y - 4 + 3y = -4

combine like terms.

-5y - 4 = -4

add 4 to both sides.

-5y = 0

divide by -5

y = 0

It's okay that it cam out to be zero. Its fine!

y=0

Put it back in one of the original equations to find x.

x = 2y + 1

x = 2(0) + 1

x = 1

The solution is

x=1

y=0

You can write this as an ordered pair.

(1,0)

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5500 milliliters equal how many liters show work
Eva8 [605]

Answer:

5.5 liters

Step-by-step explanation:

1 milliliter equals to 1/1000 part of a liter, which is 0.001 liter.

1 milliliter = 1 * 0.001 liter

So if you have 5500 milliliters that means it equals to 5500 times one milliliters and 1 milliliter = 1 * 0.001 liter, so for 5500 milliliters it is 5500 times as much

5500 * 0.001

5500 * 1/1000

5500 / 1000

5.5 liters

As long as you know this number 0.001 , then it is easily to calculate between liters and milliliters.

EXTRA:

To convert from amount A which is given in a certain quantity, to another quantity, you sometimes have to multiply and in other cases you need to divide by a certain factor. The factor defines the relationship between the quantities.

Suppose you have 1000 times 1 milliliter then you can find the amount in liters by multiplying that number of milliliters times 0.001.

It is easy to see that

1000 * 1/1000

1000 / 1000

= 1 liter, but that is easy, because I choose an easy number for the amount of milliliters to convert into liters. But it works exactly the same for any amount!

8 0
3 years ago
Read 2 more answers
Someone explain this step by step to me 1/2(c-8)=
polet [3.4K]

Answer: c/2-4


Step-by-step explanation:

This is what I get :

1/2(c-8)

Distributed property

1/2(c) + 1/2(-8)


Do c and -8 as a fraction with denominator 1 solve across

1/2×c/1+1/2×-8/1


Here you can only divide -8by 2

C/2-8/2

To get -4

C/2-4


You can't go further

4 0
3 years ago
Can a scalene triangle be equilateral
erastova [34]
No.

A scalene triangle is one with no sides equal.

An equilateral is one with the three sides equal.

So a scalene triangle can not be equilateral.
8 0
4 years ago
Legit about to be done with pathway please help, OFFERING 20 points k? please tho
puteri [66]

Answer:

The answer in the attached figure

Step-by-step explanation:

step 1

Find the area of one blue square

A=6^{2}=36\ ft^{2}  

step 2

Find the area of one orange triangle

A=(1/2)8^{2}=32\ ft^{2}

Part 1) 256\ ft^{2}

Divide the total area by the area of one orange triangle

256/32=8\ triangles

Part 2) 180\ ft^{2}

Divide the total area by the area of one blue square

180/36=5\squares

Part 3) 168\ ft^{2}

Let

x----> the number of blue squares

y ------> the number of orange triangles

we know that

36x+32y=168

Construct a table and prove different values for x and for y

we have

x=2, y=3

Two blue squares and three orange triangles

Area of blue squares

A1=2*(36)=72\ ft^{2}

Area of an orange triangles

A2=3*(32)=96\ ft^{2}

so

the area total is

72+96=168\ ft^{2}

8 0
4 years ago
How do I solve a liner equation in the form a(x-b)=cx? I have no idea plz help
Vitek1552 [10]
Distribute on the left
3x-15=7x

Subtract 3x from both sides
-15= 4x

Divide both sides by 4
-15/4= x

Final answer: x=-15/4 or -3.75
7 0
3 years ago
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