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adelina 88 [10]
2 years ago
14

P' (12,-3) is the image of P after a dilation centered at the origin with a scale factor of 3. What are the coordinates of P?

Mathematics
1 answer:
dolphi86 [110]2 years ago
6 0

Answer:

P (4, - 1 )

Step-by-step explanation:

The image coordinates are 3 times the original coordinates.

To find the original coordinates divide the image coordinates by 3

P (12 ÷ 3, - 3 ÷ 3 ) → P (4, - 1 )

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Ming drew a triangle. The sum of the angles of the triangle is 180º.
Veronika [31]

Answer: The second matrix

If we want to write a proper matrix to represent the given system of equations, we have to arrange it in order:

a+b+c=180

2a-b+0c=0

4a+0b-c=-5

After this, we can write the matrix with the coefficients of each equation:

\left[\begin{array}{ccc|c}1&1&1&180\\2&-1&0&0\\4&0&-1&-5\end{array}\right]

Being this, the matrix that represents the measure of each angle in Ming's triangle

6 0
3 years ago
Describe the trend/correlation<br> shown in the scatter plot below
Mkey [24]

Answer:

Negative correlation.

Step-by-step explanation:

Negative correlation means that as x increases, y decreases

Positive correlation means that as x increases, y also increases.

No correlation means that neither of the two above cases happens.

In the graph, we can see that on the right (when x is negative) the general y values are larger.

As x increases, the y-values decrease.

(Particularly, we could adjust these data with a linear equation with a negative slope)

Then this is a negative correlation.

3 0
3 years ago
If a line has a slope of 4 and contains the point (-2, 5), what is its equation in point-slope form?
Sveta_85 [38]

Answer:

The equation of the line is y = 4x + 13

Step-by-step explanation:

In this question, we want to write the equation of the line using the point slope form.

Mathematically, the point slope form can be represented as;

(y-y1) = m(x - x1)

where x1 = -2 , y1 = 5 and m which is the slope is 4

Plugging these values into the equation, we have;

(y-5) = 4(x - (-2))

y-5 = 4(x + 2)

y -5 = 4x + 8

y = 4x + 8 + 5

y = 4x + 13

8 0
3 years ago
Not sure how I would solve this
suter [353]
<h3>Answers:</h3>

The first ordered pair is   ( -4 , -3 )

The second ordered pair is   ( 8, 3 )

=================================================

Explanation:

The first point is (x,-3) where x is unknown. It pairs up with y = -3 so we can use algebra to find x

x-2y = 2

x-2(-3) = 2 ... replace every y with -3; isolate x

x+6 = 2

x = 2-6

x = -4

The first point is (-4, -3)

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

We'll do something similar for the other point. This time we know x but don't know y. Plug x = 8 into the equation and solve for y

x-2y = 2

8-2y = 2

-2y = 2-8

-2y = -6

y = -6/(-2)

y = 3

The second point is (8, 3)

4 0
3 years ago
1. **What is the slope of a line that passes through the points (-1,30) and (4, 10)
tresset_1 [31]

Answer:

Slope = -4

Step-by-step explanation:

Given points are :

(-1,30) and (4, 10)

We need to find the slope of the line that passes through these points.

We know that, the formula for the slope of line is given by :

m=\dfrac{y_2-y_1}{x_2-x_1}

We have, x₁ = -1, y₁ = 30, x₂ = 4 and y₂ = 10

Put values in the above formula.

m=\dfrac{10-30}{4-(-1)}\\\\=\dfrac{-20}{5}\\\\=-4

So, the slope of the line is -4.

8 0
3 years ago
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