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Vsevolod [243]
3 years ago
7

Write the equation for a parabola with a focus at (9,0) and a directrix at y = -4.

Mathematics
2 answers:
Alika [10]3 years ago
8 0

Answer:

Step-by-step explanation-3:

kondor19780726 [428]3 years ago
4 0

Answer:

(x-9)^2/8 -2 is the correct answer.

Step-by-step explanation:

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If L is the line through the point P=(3,2,1) and parallel to the vector v=⟨2,1,−3⟩, what is an equation of the plane that contai
zavuch27 [327]

Answer:

  3x +15y +7z = 46

Step-by-step explanation:

The cross product of v = <2, 1, -3> and PQ = <-5, 1, 0> is <3, 15, 7>, the normal vector of the plane of interest. That plane contains P and Q, so the constant in the plane's equation will be ...

  <3, 15, 7> · <3, 2, 1> = 46

The desired equation is ...

  3x +15y +7z = 46

4 0
3 years ago
Help, please!!! Coordinate planes: find the distance. Thanks for helping!
ruslelena [56]

Answer:

The answer would be 11.3

Step-by-step explanation:

All you have to do is figure out how far one is from the other so from 7.8 I went back to 0 of course the Y coordinate stays the same. So then you get the -3.5 make it a positive so just 3.5 and then add to 7.8 to get 11.3

Hope this helped.

A brainliest is always appreciated.

6 0
3 years ago
An example of consecutive odd integers is 23, 25, 27, and 29. Find four consecutive odd integers with a sum of 160. Show your wo
Andrew [12]
Step1: Define an odd integer.
Define the first odd integer as (2n + 1), for n = 0,1,2, ...,
Note that n is an integer that takes values 0,1,2, and so no.

Step 2: Create four consecutive odd integers.
Multiplying n by 2 guarantees that 2n will be zero or an even number.
Therefore (2n + 1) is guaranteed to be an odd number.
By adding 2 to the odd integer (2n+1), the next number (2n+3) will also be an odd integer.

Let the four consecutive odd integers be
2n+1, 2n +3, 2n +5, 2n +7 

Step 3: require that the four consecutive integers sum to 160.
Because the sum of the four consecutive odd integers is 160, therefore
2n+1 + 2n+3 + 2n+5 + 2n +7 = 160
8n + 16 = 160
8n = 144
n = 18

Because 2n = 36, the four consecutive odd integers are 37, 39, 41, 43.

Answer: 37,39,41,43

8 0
3 years ago
PLEASE ANSWER AS SOON AS YOU SEE THIS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Which expression is equivalent to 5 (2 + 7)? 2 (5 + 7) 2 + 7
mamaluj [8]

Answer:

  • D. 5 (2) + 5 (7)

Step-by-step explanation:

<u>Given expression:</u>

  • 5(2 + 7)

<u>Distribute this to get:</u>

  • a(b + c) = ab + ac
  • 5(2 + 7) = 5(2) + 5(7)

Correct choice is D

6 0
3 years ago
Read 2 more answers
This histogram shows the number of shoppers in various age groups at a clothing store.
kogti [31]
12 shoppers are above 20 years old
4 0
3 years ago
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