1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
zavuch27 [327]
3 years ago
7

4. A triangle has vertices (-2,-3) (3,5) and (8,-1) .

Mathematics
2 answers:
Hatshy [7]3 years ago
7 0
Given:
Vertex 1 (-2,-3)
Vertex 2 (3,5)
Vertex 3 (8,-1)

Reflection across the x-axis rule (x,y) → (x -y)
Vertex 1 (-2,-3) → (-2,-(-3)) → (-2,3)
Vertex 2 (3,5) → (3,-5)
Vertex 3 (8,-1) → (8,-(-1)) → (8,1)

Rotation 90° clockwise (x,y) → (y,-x)  *I'm assuming the original triangle was rotated and not the reflection.
Vertex 1 (-2,-3) → (-3,-(-2)) → (-3,2)
Vertex 2 (3,5) → (5,-3)
Vertex 3 (8,-1) → (-1,-8)


elena-14-01-66 [18.8K]3 years ago
5 0

Answer with explanation:

(a)→Coordinates of Vertices of triangle = (-2,-3), (3,5) and (8, -1).

Plotting these points in two dimensional coordinate plane:

Now when the points are reflected through X axis, the distance of points from line , y=0, on both sides is same .That is distance of Preimage from ,line, y=0 is same as Distance of Image from the line.

≡Rule of reflection of (x,y)→ (x, -y).

⇒Coordinates of Image =(-2,3), (3, -5), (8,1).

In Matrix form

\left[\begin{array}{ccc}-2&-3\\3&5\\8&-1\end{array}\right] \text {reflected across X axis}=\left[\begin{array}{ccc}-2&3\\3&-5\\8&1\end{array}\right]

(b) → Coordinates of Vertices of triangle = (-2,-3), (3,5) and (8, -1) is rotated by 90 degree, the vertices of triangle will be , (-3, 2), (5, -3), (-1, -8).

The rule is , after 90 degree rotation . point (a,b)→(b, -a).

Plotting these points in two dimensional coordinate plane:

In Matrix form

\left[\begin{array}{ccc}-2&-3\\3&5\\8&-1\end{array}\right] \text {reflected across X axis}=\left[\begin{array}{ccc}-3&2\\5&-3\\-1&-8\end{array}\right]

You might be interested in
Given the recursive formula shown, what are the first 4 terms of the sequence?
jeyben [28]

Answer:

B. 5, 20, 80, 320.

Step-by-step explanation:

f(1) = 5

After the first rem, each term id 4 times the previous term,  so:

f(2) = 4f(1) = 4*5 = 20.

f(3) = 4f(2) = *20 = 80

f(4) = 4(f3) = 4*80 = 320.

6 0
3 years ago
Divide using long division. <br><br> <img src="https://tex.z-dn.net/?f=%284x%5E%7B2%7D%20-5x%2B3%29" id="TexFormula1" title="(4x
frez [133]

Answer:

The quotient = 4x - 17 and the remainder = 54

Step-by-step explanation:

\frac{4x^{2}-5x+3 }{x+3}=4x+\frac{-17x+3}{x+3}

\frac{-17x+3}{x+3}=-17+\frac{54}{x+3}

The quotient = 4x - 17 and the remainder = 54

6 0
2 years ago
Read 2 more answers
Write an inequality for the graph below
andrezito [222]

Answer:

y > -1/4x + 4

Step-by-step explanation:

First find the equation of the line itself, which is y = -1/4x + 4, then determine if graph shades above the line or below the line. If it shades above which is true in this case, it will be greater than. If it shades below which does not occur in this case, it will be less than. Because the line is dashed and not solid, it will just be greater than or less than.

Therefore y = -1/4x + 4 → y > -1/4x + 4 [Shades above the line, line is dashed].

6 0
2 years ago
Solve for the value of n <br> (9n) (8n+8)
Hatshy [7]

Answer:

undoable

Step-by-step explanation:

theres no =

3 0
2 years ago
If 70 mL of solution contains 280 mg of drug, how many milligrams of drug are in 50 mL of solution?
Ierofanga [76]
280 mg = 70 Ml
280/70 = 4
50 mL x 4 = 200 mg

200 mg
8 0
1 year ago
Other questions:
  • For every 6kg a child's weight, pediatricians prescribe 17mg of acetaminophen. If Lexie weighs 48 kg, how many milligrams of the
    13·1 answer
  • Tickets for Adults were $14.50 and tickets for Children were $9.00. We purchased 12 tickets and spent a total of $135.50 to get
    7·2 answers
  • It takes Jill 2 hours to run 14.5 miles. At this rate, how far could she run in 3 hours?
    5·2 answers
  • What value of x makes the equation true? 15(2x−10)+4x=−3(15x+4)
    5·1 answer
  • Mabel scored 19 points more on her math test than Nancy. Phoebe scored 10 points less on her math test than Nancy. If Phoebe sco
    5·2 answers
  • A right triangle has the following measures. a = 3 and b = 4. what is the length of side c?
    5·1 answer
  • Someone plz help me giving brainliest
    10·2 answers
  • The cubic crystal company has a new crystal cube they want to sell. The packaging manager insists that the cubes be arranged to
    14·2 answers
  • 8 1/2 - 6 1/4 please subtract
    8·2 answers
  • The area of a circle is 100π cm². What is the circumference, in centimeters? Express your answer in terms of \piπ.
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!