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2 years ago

Please help, will give brainliest! Reflect this figure over the y-axis:

Mathematics

1 answer:

tatiyna2 years ago

3 0

Answer:

The final answer, or D.

Step-by-step explanation:

When flipping a shape over the y axis, the y coordinates stay the same, while the x coordinates are opposite. (If the x coordinates are negative, the flipped shape will have positive x coordinates.)

The shape that fits this description is D. or the answer at the very bottom.

<h2>I hope this helped you!</h2>

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The cross section of a parabolic reflector has a vertical axis of symmetry with its vertex at (0,0) . The focus of the reflector

Paha777 [63]

Answer:

The depth of the reflector is 0.84 feet

Step-by-step explanation:

(See the figure below)

The equation of a parabola centered at the origin with an axis of symmetry on y-axis is:

$x^{2}=4py$ (1)

With p the distance from the origin to the focus using p=6, the equation (1) of the parabola becomes:

$x^{2}=4(6)y=24y$ (2)

Note that the point B is on the parabola, so this point should satisfy the parabola equation (2) that allow us to use the value x=4.5 to find the y value associated to it, that it is the depth (h) of the reflector:

$(4.5)^{2}=24y$ , solving for y

$y=\frac{(4.5)^{2}}{24}\approx0.84\,ft$

4 0

3 years ago

Simplify the following expression: (6.8 × 10^3) ×(4.54 × 10^6)

swat32

$(6.8\cdot10^3)\cdot(4.54\cdot10^6)=(6.8\cdot4.54)\cdot(10^3\cdot10^6)=30.872\cdot10^{3+6}\\\\=30.872\cdot10^9=3.0872\cdot10^{10}$

8 0

2 years ago

9-3 divided by 1/3 + 1 =

Black_prince [1.1K]

Answer: The answer is 1

4 0

1 year ago

Read 2 more answers

How to do polynomials

Travka [436]

Answer:

Step-by-step explanation:

12/6 is 2 and the the exponents when you are dividing you just subtract. so 9-3 = 6 which makes it x^6.

5 0

2 years ago

Look at this system of equations. How can the system be changed so that the two equations have equal x-coefficients?

Volgvan

I believe the correct answer from the choices listed above is option A. The system can be changed so that the two equations have equal x-coefficients by multiplying both sides of the top equation by 2 resulting to 6x + 4y = 24. Hope this answers the question.

5 0

2 years ago