3 years ago

I need help also say how you got the answer

1 answer:

5 0

Your answer is F.

It says she walks at a rate of 4 miles PER hour. If there is a word “per” that means you are multiplying which gives you 4p.

Lastly, it says she has a goal of walking AT LEAST 18 miles. That means 4p must be same or greater than 18.

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Find the quadratic function .. 3x2 - y2 = 9 x2 + 2y2 = 38

ruslelena [56]

Answer:

Step-by-step explanation:

3x2 - y2 = 9.........(1)

x2 + 2y2 = 38......(2)

Let x^2 = a and y^2 = b

:- the two equations becomes

3a - b = 9..........(3)

a + 2b = 38.......(4)

Multiplying (4) by 3

3a + 6b = 114........(5)

Substracting (3) from (5)

3a - 3a + 6b - (-b) = 114 - 9

6b +b = 105

7b = 105

b = 105/7

b = 15

And 3a - b = 9 putting b = 15

3a - 15 = 9

3a = 15+9

3a = 24

a = 24/3

a = 8

And

x^2 = a

x^2 = 8

x = √8

x = √(4×2)

x = 2√2

Also y^2 = b

y^2 = 15

y = √15

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3 years ago

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Alenkasestr [34]

Answer:

$\sqrt{8 + y}$

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Anarel [89]

Answer:

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Step-by-step explanation:

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allsm [11]

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