120175

04.06.2020 • 

Mathematics

Determine the attributes of the hyperbola represented by this equation: (y-21)^2/20^2 - (x+20)^2/21^2 = 1

What are the vertices?

A. (-41,21) and (1,21)

B. (-20,0) and (-20,42)

C. (-20,1) and (-20,41)

D. (20,1) and (20,41)

The foci are

A. (-50,21) and (10,21)

B. (-20,-8) and (-20, 50)

C. (-20,-10) and (-20,52)

D. (20,-8) and (20,42)

Ответ:

anthonysutton82

06.04.2021

Mathematics

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A) We know that she make $7 per hour, with this we can make a table:

1hr | $7

2hr | $14

3hr | $21

etc...

B)  If in one week she earns $105 and 1w = 7h (1hr = $7) holds true, that means that we have to divide 105 by 7 which gives us 15hrs

C) If she baby-sat for 24hrs, we just have to multiply that by 7 and we get $168

Hope that helped!

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