izzzzz49

11.10.2019 • 

Mathematics

Two similar triangles are shown on the coordinate grid:
a coordinate plane is shown. triangle abc has vertices a at negative 3 comma 2, b at negative 1 comma 0, and c at negative 2 comma negative 1. triangle a prime b prime c prime has vertices a prime at 6 comma 4, b prime at 2 comma 0, and c prime at 4 comma negative 2.

which set of transformations has been performed on triangle abc to form triangle a′b′c′? (4 points)

dilation by a scale factor of 4 followed by reflection about the x-axis

dilation by a scale factor of 2 followed by reflection about the x-axis

dilation by a scale factor of 4 followed by reflection about the y-axis

dilation by a scale factor of 2 followed by reflection about the y-axis

Ответ:

khohenfeld0

01.02.2023

Mathematics

---

-2u + w ⇒ answer B

Step-by-step explanation:

* To solve this problem you must find the result from the graph

- The ray move from the origin 6 units to the left and then 1 unit up

∴ The result is <-6 , 1>

* Now lets check which answer give the same result

∵ u = <5 , -5> , v = <1 , -4> , w = <4 , -9>

# Answer A: w - 2v

∵ w = <4 , -9>

- Find 2v by multiply v by 2

∵ 2v = 2<1 , -4> = <2 , -8>

- Subtract 2v from w

∴ w - 2v = <4 , -9> - <2 , -8> = <(4 - 2) , (-9 - -8)> = <2 , -1> ≠ <-6 , 1>

# Answer B: -2u + w

∵ u = <5 , -5>

- Find -2u by multiply u by -2

∵ -2u = -2<5 , -5> = <-10 , 10>

- Add -2u and w

∵ w = <4 , -9>

∴ -2u + w = <-10 , 10> + <4 , -9> = <(-10 + 4) , (10 + -9)> = <-6 , 1> = <-6 , 1>

∴ The answer is B

---

0,0(0 оценок)