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loris [4]
3 years ago
7

Can anyone help me with this question

Mathematics
1 answer:
faust18 [17]3 years ago
6 0

Answer:

Step-by-step explanation:

Like your other question, let's break it down systematically

6x + 9y - 9(6x - 3y + 8z)

Use the distributive property

6x + 9y - <u>9(6x - 3y + 8z)</u>

6x + 9y - 54x - 27y + 72z

Match like terms

6x - 54x = -48x

9y - 27y = -18y

72z - 48x - 18y

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0 If x and y vary inversely and y=6 as x=7, what is the constant of variation?
gizmo_the_mogwai [7]

Answer:

k = 42

Step-by-step explanation:

given that x and y vary inversely then the equation connecting them is

y = \frac{k}{x} ← k is the constant of variation

To find k use the condition y = 6 when x = 7

k = yx = 6 × 7 = 42

3 0
3 years ago
Find the area of the figure below.<br>8 cm<br>10 cm<br>18 cm<br>​
Katyanochek1 [597]

Answer:

144cm^2

Step-by-step explanation:

The 10 in the shape is the altitude, but we don't need that for the area.

The area of a parallelogram is base times height.

The base in the figure is 18 and the height in the figure is 8.

So all we do is multiply 18 by 8 to get 144.

4 0
3 years ago
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ΔXYZ was reflected to form ΔLMN. Which statements are true regarding the diagram? Check all that apply.
emmasim [6.3K]
There is no diagram that we can see.
8 0
3 years ago
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Hi, guys whoever can help me with this question and give me the right answer, I will award brainliest. Please give answer fast.
kifflom [539]

Answer:

X= 65

Step-by-step explanation:

180°-50°=130 (Angles on a straight line)

2x=130 ( Corrresponding Angle)

X= 130÷ 2

= 65

Hope this helps.

4 0
3 years ago
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If the original rectangle has an area of 2 cm squared and the scaled copied has an area of 50 cm squared what is the scale facto
vazorg [7]

Answer:

The scale factor used to draw the scaled copy is a factor of 5

Step-by-step explanation:

Here, we are interested in calculating the scale factor which was used to transition the original rectangle to the new scaled copy.

Firstly, there is a way to relate how the scale factor of the sides relate to the scale factor of the area. What we are saying here is that the scale factor of the sides is never equal to that of the area;

For a 2 cm^2 area let’s say the sides are 1 by 2 ; this gives us an area as said

Now, to get 50cm^2, we can see that the scale factor of both areas is 25 (2 to 50)

So the area has been scaled 25 times the original area. So how has the sides been scaled?

Using a general principle, the scale used to scale the area is the square of the scale used to scale the sides. What are we saying here? if the area is scaled by 4, then the sides are scaled by 2

So in this particular case, the area is scaled by a factor of 25

Now, the scale factor of the sides will be the positive square root of this which is 5

Hence, we can conclude that the sides of the smaller triangles were each multiplied by 5 to arrive at the sides of the bigger one which makes it that the scale factor used to draw the scaled copy is 5

8 0
3 years ago
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