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hichkok12 [17]
4 years ago
11

Find the constant of variation k for the direct variation 3x+5y=0

Mathematics
1 answer:
Eva8 [605]4 years ago
3 0

Answer:

-3/5

Step-by-step explanation:

3x+5y=0

Subtract 3x from each side

3x+5y-3x=0-3x

5y = -3x

Divide each side by 5

5y/5 = -3x/5

y = -3/5 x

A direct variation is y = kx

y = -3/5 x

The constant of variation is -3/5

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24 people can sit at three tables lined in a row

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3 years ago
If you can buy 1⁄4 pizza for 5 dollars, how much can you purchase for 8 dollars? Write your answer as a fraction.
kap26 [50]

Answer:

2/5 pizza

Step-by-step explanation:

If 1/20 is one dollar, you can buy 8/20, that is 2/5 pizza

5 0
3 years ago
Susan has 3 lists, each with 10 numbers. If there are 4 numbers on all three lists and 5 numbers on exactly 2 lists, how many nu
VikaD [51]

Answer:

Susan has 8 numbers belonging to just one list.

Step-by-step explanation:

Susan's 3 lists have 10 numbers each = 10 x 3 =  30 numbers

4 numbers appear on all three lists = 4 x 3 = 12 numbers

The remaining numbers after these 12 = 18 (30 -12)

Then, there are 5 numbers on 2 lists only = 5 x 2 = 10 numbers

The numbers on just one list = 18 - 10 = 8 numbers

Or

                                    List 1     List 2    List 3   Total

Numbers on each list    10           10         10      30

Numbers on 3 lists        -4           -4         -4        12

Numbers on 2 lists        -5           -5        -0        10

Numbers on 1 list only    1             1          6         8

6 0
3 years ago
Find the diameter of a circle whose equation is
Olin [163]

Answer:

D) 20

Step-by-step explanation:

x^2 + (y - 2)^2=100

This can be rewritten as

(x-0)^2 + (y - 2)^2=10^2

This is in the form

(x-h)^2 + (y - k)^2=r^2

The radius is 10

The diameter is 2 times the radius

d = 2*r = 2*10 = 20

7 0
3 years ago
HELP ME OUT PLSSS ALSO DUE TODAY!
disa [49]

Answer:

x > -15, you are welcome we all need help

4 0
2 years ago
Read 2 more answers
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