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Molodets [167]
4 years ago
7

Need the answer for this it’s kinda simple to do but i forgot how to do it.

Mathematics
1 answer:
Shtirlitz [24]4 years ago
6 0

Given:

Original point (2, -2)

Scale factor (k) = 5

Center = origin = (0, 0)

To find:

The image of (2, -2)

Solution:

Let (x, y) be the original point and (x_0, y_0) be the image of the point.

Image of the point is obtained by multiplying original point by scale factor.

\Rightarrow (x_0, y_0)=k(x, y)

Substitute the given values:

\Rightarrow (x_0, y_0)=5(2, -2)

\Rightarrow (x_0, y_0)=(5 \cdot 2, 5 \cdot  -2)

\Rightarrow (x_0, y_0)=(10, -10)

The image of (2, -2) after dilation is (10, -10).

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An arch in the shape of the upper half of an ellipse is used to support a bridge that is to span a river 20 meters wide. The hei
MatroZZZ [7]

Title:

<h2>Check the explanation.</h2>

Step-by-step explanation:

The standard form of an ellipse is \frac{x^{2} }{a^{2} } + \frac{y^{2} }{b^{2} } = 1.

The span of the river is 20 meters. As per the given condition, y-axis will pass through the middle point of the river. That is why, the value of a will be \frac{20}{2} = 10.

Since the height of the arc is 6, the value of b is 6.

The equation of the arc will become \frac{x^2}{{10}^2} + \frac{y^2}{6^2} = 1.

8 0
4 years ago
Rounded to the nearest 3 decimal places, what is the value of r for this data set?
bogdanovich [222]
Using geogebra (see attached), I get roughly r = 0.98886 which rounds to r = 0.989

Answer: 0.989

Side Note: The fact that r is very close to +1 means the data set has strong positive linear correlation. The points all fall very close to a line with positive slope. 

3 0
3 years ago
5x + 10 = 20
Andrei [34K]

To solve for <em>x</em>, we must first isolate the term containing <em>x</em> which in this problem is 5x.

Since 10 is being added to 5x, we subtract 10 from both sides of the equation to isolate the 5x.

On the left, the +10 and -10 cancel out and on the right, 20 - 10 is 10 and we have 5x = 10.

Now we can finish things off by just dividing both sides of the equation by 5. On the left the 5's cancel and on the right, 10 divided by 5 is 2 so <em>x = 2</em>.

4 0
4 years ago
1. Joe created triangular shaped flag for his history project. The height of the flag was 16 cm and the
borishaifa [10]

The area of the flag that Joe created is 216 cm²

Step-by-step explanation:

Joe created triangular shaped flag for his history project

  • The height of the flag was 16 cm
  • The  base of the flag was 27 cm

∵ The flag is shaped a triangle

∵ Area of a triangle = \frac{1}{2} × base × height

∵ The base of the flag = 27 cm

∵ The height of the flag = 16 cm

- Substitute these values in the rule of the area above

∴ The area of the flag = \frac{1}{2} × 27 × 16

∴ The area of the flag = 216 cm²

The area of the flag that Joe created is 216 cm²

Learn more:

You can learn more about area of a triangle in brainly.com/question/10677255

#LearnwithBrainly

3 0
4 years ago
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