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weqwewe [10]
3 years ago
14

Please I need help

Mathematics
2 answers:
Dimas [21]3 years ago
8 0

Answer:

Step-by-step explanation:

The directrix is a vertical line, so the parabola is horizontal. The focus lies to the left of the directrix, so the parabola opens to the left.

For a left-opening parabola:

x = a(y-k)²+h,

a < 0,

vertex (h,k)

focal length p = 1/|4a|

focus (h-p, k)

directrix: x=h+p

Apply your data

focus (1,-4)

directrix x=2

vertex (1.5,-4).

focal length p = 0.5

a = -1/|4p| = -½

x = -½(y-2)²+ ½

masha68 [24]3 years ago
4 0

Answer:

x= -(y+4)^2/2 +3/2 is the correct answer.

Step-by-step explanation:

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Solve for f <br> 0.3=0.5f-0.7
erastovalidia [21]

Answer:

f=2

Step-by-step explanation:

0.3+0.5f-0.7

Move the varibale (0.5f) to the left-hand side and change it's sign to negative.

-0.5+0.3+-0.7

Move the constant to the right hand side and change it's sign

-0.5f=-0.7-0.3

Calulate the differnce

-0.5f=-1

divide both sides by -0.5

F=2

7 0
3 years ago
it takes 70 oz of grass seed to seed 2800ft of lawn. at this rate, how much would be needed for 3600 ft of lawn?
Rom4ik [11]
Find the multiplier to get from 2800ft to 3600ft. Multiply the weight of seed required for 2800ft by this multiplier for your answer.
3600/2800=9/7
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4 0
3 years ago
If one of you guys wouldn’t mind helping me do this question it would really speed up the process I have like 10 minutes now
EastWind [94]

Answer:

13. 70(two digits 7 times 10 which is a multiple of 5)

Hope This Helps!!!

7 0
2 years ago
Please hurry I need the answer
timama [110]

Answer:

4.12

Step-by-step explanation:

A^2+b^2=c^2 so 8^2+b^2=9^2 so 64+b^2=81 so b^2=17 so b=4.12

7 0
3 years ago
4.4 is what % of 25 ​
kirza4 [7]

4.4 = .044

0.044x25 = 1.1

ANSWER = 1.1

8 0
3 years ago
Read 2 more answers
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