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eduard
3 years ago
15

HELP ASAP ILL GIVE BRAINLIST

Mathematics
2 answers:
Afina-wow [57]3 years ago
8 0
Answer:

y = -4.5

Explanation:

Since the line is parallel to the x axis, the y coordinate of the line is not changing thus is a constant. Therefore we can say that the equation for the above line is
y = -4.5

Answered by GAUTHMATH
Minchanka [31]3 years ago
3 0

Answer:

Horizontal line

Step-by-step explanation:

uehdjd

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Which is the equation of a parabola with a directrix at y = −3 and a focus at (5, 3)?
kramer

Answer:

y = 1/12 (x − 5)²

Step-by-step explanation:

We can solve this graphically without doing calculations.

The y component of the focus is y = 3.  Since this is above the directrix, we know this is an upward facing parabola, so it must have a positive coefficient.  That narrows the possible answers to A and C.

The x component of the focus is x = 5.  Since this is above the vertex, we know the x component of the vertex is also x = 5.

So the answer is A. y = 1/12 (x−5)².

But let's say this wasn't a multiple choice question and we needed to do calculations.  The equation of a parabola is:

y = 1/(4p) (x − h)² + k

where (h, k) is the vertex and p is the distance from the vertex to the focus.

The vertex is halfway between the focus and the directrix.  So p is half the difference of the y components:

p = (3 − (-3)) / 2

p = 3

k, the y component of the vertex, is the average:

k = (3 + (-3)) / 2

k = 0

And h, the x component of the vertex, is the same as the focus:

h = 5

So:

y = 1/(4×3) (x − 5)² + 0

y = 1/12 (x − 5)²

3 0
2 years ago
WHAT IS 6 1/12 - 4 2/3=
Ede4ka [16]
6 1/12 - 4 2/3
6 1/12 - 4 8/12
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1 5/12
3 0
2 years ago
Decide whether the two expressions are equivalent for each problem below.
Vesnalui [34]

Answer:

Step-by-step explanation:

6 0
2 years ago
A year ago, my dog weighed 3kgs. I weighed him today and he weighs 4/10 more. How much does he weigh now?
Mariana [72]

Answer: He now weighs 4.2 kg because 4/10 of 3 is 1.2 and 1.2+3=4.2

5 0
3 years ago
The altitude at which we boil an egg affects how long it takes for the egg to achieve perfect hardness. It takes 198 seconds to
solong [7]

Answer:

198

Step-by-step explanation:

198

7 0
3 years ago
Read 2 more answers
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