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3 years ago

Which equation represents a line which is parallel to the line 3x+7y=28

Mathematics

2 answers:

Nitella [24]3 years ago

8 0

C is parallel to the line.

MrRissso [65]3 years ago

5 0

C or the third one because you have to make the Y by itself and drag the X to the opposite side of the = sign. The x turns to a negative because the sign changes when it switches places. Then when 7y is by itself, you divide everything by 7 so, 7y/7= -3x/7 + 28/7 . You simplify each. 7y/7 cancels down to y. -3x/7 stays the same because it is the slope. 28/7 is 4 because you divide. So you get y= -3x/7 + 4 .

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. The length of a micrometer is

Verdich [7]

Move the decimal five places until it is after one number, and because the number got bigger, your exponent is a negative.

4 0

3 years ago

What is the ratio of these volumes if the dimensions were length = 4, width = 3, and height = 2? Fill out the table below.

tatyana61 [14]

Explanation:

Linear escale factor 1.

In this case the original volume of the parallelepiped is:

$Volume=4*2*3=24\text{ u}^3$

24 cubic units and the new volume must be:

$NewVolume=\left(4*1\right)\left(2*1\right)\left(3*1\right)=24u^3$

So in this case the ratio of volumes is 1:1

Linear escale factor 2.

In this case the original volume of the parallelepiped is the same: 24 cubic units.

The new voume must be:

$NewVolume=\left(4*2\right)\left(2*2\right)\left(3*2\right)=8*4*6=192u^3$

So in this case the ratio of volumes is 24:192, that is 1:8

Linear escale factor 3.

In this case the original volume of the parallelepiped is the same: 24 cubic units.

The new voume must be:

$NewVolume=(4\times3)(2\times3)(3\times3)=12*6*9=648u^3$

So in this case the ratio of volumes is 24:648, that is 1:27

Linear escale factor 4.

In this case the original volume of the parallelepiped is the same: 24 cubic units.

The new voume must be:

$NewVolume=(4\times4)(2\times4)(3\times4)=16\times8\times12=1536u^3$

So in this case the ratio of volumes is 24:1536, that is 1:64

Linear escale factor r.

In this case the original volume of the parallelepiped is the same: 24 cubic units.

The new voume must be:

$NewVolume=(4*r)(2*r)(3*r)=4r\times2r\times3r=24r^3\text{ }u^3$

So in this case the ratio of volumes is 24:24r^3, that is:

$1:r^3$

5 0

1 year ago

Which is a correct frost step for solving this equation

horsena [70]

Answer:

you have to post the equation

Step-by-step explanation:

6 0

3 years ago

7/8 - 4/5 what is the answer to this thing because i don't know it at all duhhhh

wlad13 [49]

7/8-4/5. When subtracting two fractions, we must have a common denominator. A common denominator is a factor in which goes into both 8 and 5.

1.) Common factor: 45. 45 goes into and 8 and 5. If we list out all the factors of 8 and 5, 45 will be the lowest common factor.

2.) We need to multiply by a number to get 45 for each denominator. We can a one-step equation to figure out what we need to multiply 8 by and 5 by to get 45.
X=the factor of 8 that will get us 45.
8x=45
8x/8=45/8
x=5.625.
Y=factor of 5 that will get us 45.
5y=45
5y/5=45/5
y=9.

3.) We now know that we need to multiply 8 by 5.625 and 5 by 9 in order to get 45 as the denominator for both fractions.
7/8x5.625-4/5x9
7/45-4/45.

4.) Whatever is done to the denominator must be done to the numerator.
7x5.625/45-4x9/45
39.375/45-36/45

5.) We now have common denominators, so we simple subtract the numerators ONLY. We DO NOT subtract the denominators.
39.375/45-36/45=3.375/45.

Therefore, 3.375/45 is your answer.

4 0

2 years ago

4t-8 select all that apply. A: 4(t-2) B: 4(t-8) C: (t-2)4 D: 4(4t-2)

Softa [21]

Answer:

A. is the answer.

Step-by-step explanation:

4t-8=4×(t-2)

4=0

t-2 add to both side of equation

t=2

8 0

3 years ago