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lapo4ka [179]
3 years ago
10

The sum of two numbers is 12. The first number, x, is twice the second number, y. Which system of equations could be

Mathematics
1 answer:
Natalija [7]3 years ago
5 0

Answer:

x + y = 12

x = 2y

Step-by-step explanation:

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Solve the system.
patriot [66]

Answer:

D.(2,-1,-1)

Step-by-step explanation:

-a+4b+2c=-8

3a+b-4c=9

b = -1

Substitute b=-1 into the other equations

-a -4 +2c = -8

3a -1 -4c =9

Multiply the first equation by 2 so we can eliminate c

-2a -8 +4c = -16

Add this to the second equation

-2a -8 +4c = -16

3a -1 -4c =9

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

a -9 = -7

Add 9 to each side

a-9+9 = -7+9

a =2

b=-1

Now we need to find c

-a +4b +2c = -8

-2 -4 +2c = -8

-6+2c = -8

Add 6 to each side

-6+6 +2c = -8+6

2c = -2

Divide by 2

2c/2 = -2/2

c=-1

(2,-1,-1)

5 0
4 years ago
What is the slope of the line y=1
cupoosta [38]

Answer:

See the IMAGE FOR SOLUTION

Brainlost please

4 0
3 years ago
Read 2 more answers
Not sure if i got this right?
aleksandrvk [35]

Answer:

The effect it will have on the volume is;

The volume will be 8 times larger

Step-by-step explanation:

The dimensions of the given prism are;

The length of the prism, l = 5 in.

The breadth of the prism, b = 5 in.

The slant height of the prism,  = 4 in. by 5 in.

The height of the prism, h = 7 in.

The shape of the prism = Parallelepiped

The volume of a parallelepiped = Area of Base × Height of the prism

The base area of the parallelepiped = The length × Breadth of the parallelepiped

∴ The base area of the given parallelepiped = 5 in. × 5 in. = 25 in.²

The volume of the given parallelepiped, V₁ is found as follows;

V₁ = 5 in. × 5 in. × 7 in. = 25 in.² × 7 in. = 175 in.³

When a scale factor of 2 in applied to the dimensions of the prism, we have;

The new volume, V₂ =  2 × 5 in. × 2 × 5 in. × 2 × 7 in.

∴ V₂ = 2 × 2 × 2 × 5 in. × 5 in. × 7 in. = 8 × 5 in. × 5 in. × 7 in. = 8 × V₁

Therefore;

V₂ = 8 × V₁

The volume of the image of the object, V₂ after applying a scale factor of 2 is 8 times larger than the volume of the object, V₁.

5 0
3 years ago
Beatrice is planning a personal budget. Which part of her budget will be easiest to change?
Lerok [7]

Answer: It’s C

Step-by-step explanation: It is easiest to change what wants you want to spend your money on. It is hard to ask for a raise or income change. And spending on needs might not change, same goes for savings.

4 0
3 years ago
The box plots show the number of hours of television a group of middle school students and a group of elementary school students
DedPeter [7]

The correct answer is A,C and D

I'm smart yw :)

5 0
2 years ago
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