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BaLLatris [955]
3 years ago
11

What is the image of (-7, -9) after a reflection over the x-axis?

Mathematics
2 answers:
miss Akunina [59]3 years ago
4 0

Answer:

(-7,9)

Step-by-step explanation:

When you flip over the x-axis, the y-value changes its sign. Vice versa.

Veseljchak [2.6K]3 years ago
3 0

\huge\boxed{\boxed{\bold{(-7, 9)}}}

\hrulefill

To reflect a point across the x-axis, multiply or divide its y coordinate by -1:

P'=(-7, -9*-1)

Multiply:

P'=\large\boxed{(-7, 9)}

<em>An image is attached showing the original point (</em>P<em>) and its image (</em>P'<em>).</em>

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Need help on this one too
amid [387]

Answer:

If this is for a triangle then the answer is 45°

Step-by-step explanation:

Triangles are always 180° so if you have a right angle know that, that means the angle is 90°. So angle CAB is 90° and angle DAB is 45°. You take 180° and subtract 90° which leaves you with 90°. Then you take that 90° and subtract 45° and that leaves you with 45°.

8 0
3 years ago
Enter the equation of the circle described below.<br> Center (-3, 0), radius sqrt 5
stealth61 [152]
Hello : 
<span> the equation of the circle is (x-a)²+(y-b)² = r²
A(a;b) center     r : </span><span>radius
</span>in this exercice : (x+3)²+y²=25
3 0
3 years ago
Read 2 more answers
What is the percent of decrease from 100 to 49?<br><br> Write your answer using a percent sign (%).
slavikrds [6]

Answer:

Step-by-step explanation:

Decrease = 100 - 49 = 51

Percentage of decrease =

=\frac{51}{100}*100

= 51%

6 0
3 years ago
1<br> Which sequence of transformations takes AA to its image, AB ?
lianna [129]

A rigid transformation preserves the dimensions of the image

The option that gives the sequence of transformation that takes ΔB to ΔB is  the option B.

<u>(B) Reflection across y-axis and a translation 2 units down </u>

Reason:

Question: The sequence of transformation that takes ΔA to image ΔB

<em>From a similar question, we have, ;</em>

<em>The vertices of triangle ΔA are; (-8, 9), (-9, 4), (-3, 4)</em>

<em>The vertices of triangle ΔB are; (8, 7), (3, 2), (9, 2)</em>

<em>The options are; </em>

<em>(A) Reflection over the x-axis and 2 units translation down</em>

<em>(B) Reflection over the y-axis and 2 units translation down</em>

<em>(C) 90° rotation after a translation of 2 units down</em>

<em>(D) 90° rotation after a translation of 12units right</em>

Solution;

The length of the base of ΔA = -3 - (-9) = 6

The length of the base of ΔB = 9 - 3 = 6

Therefore, the length s of triangle A and triangle B are equal

The orientation of the base of ΔA and ΔB are both horizontal

The location of the the side that traverses four cells are both furthest from the y-axis, or the vertical

Therefore, ΔB is a reflection of ΔA across the y-axis

We also have;

The base of ΔB is 2 units lower than the base ΔA

Therefore, the correct option is option B, reflection across y-axis and a translation 2 units down

Learn more here;

brainly.com/question/23461633

7 0
3 years ago
What is the equation of a line when the slope is 7 and the y-intercept is -9.
den301095 [7]

Answer:

y = 7x - 9

Step-by-step explanation:

y = mx+b

    m = slope = 7

    b = y-intercept = -9

5 0
3 years ago
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