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melisa1 [442]
4 years ago
6

If a person's eye level is

Mathematics
2 answers:
dem82 [27]4 years ago
5 0
Reallyhow is this elementry
docker41 [41]4 years ago
3 0

Answer:

The height is 39 meters above sea level

Step-by-step explanation:

The function that relates the person's eye level above sea level (h) and the kilometers the person can see to the horizon (d) is:

d = 3.6*√h

If the person can see  22.5  kilometers to the horizon, then  the height of her eye level above sea level is obtained replacing this d value in the equation and solving for h, as follows:

22.5 = 3.6*√h

22.5/3.6 = √h

6.25^2 = h

h ≈ 39

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Keith_Richards [23]

Answer:

y = -5x - 17

Step-by-step explanation:

Linear equations, or lines, that are perpendicular to each other have opposite reciprocals for the value of slope.  For the given line, y = 1/5x - 2, the slope is 1/5 and the opposite reciprocal is -5.

Given the value of the slope and a given point on the second line, you can solve for 'b':

y = mx + b

8 = (-5)(-5) + b

8 = 25 + b

-17 = b

y = -5x - 17

3 0
3 years ago
What is the y-intercept of this quadratic function f(x) = x^2 + 2x + 3 A. (0,1) B. (0,-1) C. (0,-3) D. (0,3)
Firdavs [7]

Answer:

d=(0,3)

Step-by-step explanation:

8 0
3 years ago
Will mark brainless
iren2701 [21]

Answer:

Step-by-step explanation:

y = 3x + 2

6x – 2y = 10

Ryan’s answer:

I solved by adding the equations. The solution is .

y = 3x + 2 → 3x + y = 2

6x – 2y = 10 → 3x – y = 5

6x = 7

x =

6x – 2y = 10 → 6 – 2y = 10

7 – 2y = 10

–2y = –3

y = -

Jesse’s answer:

I used matrices. The solution is .

Mark’s answer:

I graphed the equations. The lines are parallel and do not intersect, so there is no solution.

6 0
3 years ago
Work out 3/4 + 4/7 what is the answer to this question
worty [1.4K]

Answer:

1 and 9/28

Step-by-step explanation:

you need to put everything over the same denominator

21/28+16/28=37/28

this can be written as  1 9/28

7 0
3 years ago
What is the 18th term of the arithmetic
Irina18 [472]

Answer:

J

-66

Step-by-step explanation:

a1 = 2

n = 18

d = - 4

a18  =  a1 + (n - 1) * d

a18 = 2 + (18 - 1)*(-4)

a18 = 2 + 17*-4

a18 = 2 - 68

a18 = -66

3 0
3 years ago
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