3 years ago

Please help with number 3

Mathematics

1 answer:

diamong [38]3 years ago

7 0

Answer:

6/8 y=79

my id has now been sent off

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I need help answering the question in the picture provided

adoni [48]

answer:

(a).

Equation of circle is x² + y² - 25 = 0

(b).

(-5, 0) » yes

(√7, 1) » no

(-3, √21) » no

(0, 7) » no

Step-by-step explanation:

(a).

If centred at origin, centre is (0, 0)

General equation of circle:

${ \boxed{ \bf{ {x}^{2} + {y}^{2} + 2gx + 2fy + c = 0}}}$

but g and f are 0:

${x}^{2} + {y}^{2} + c = 0 \\ but : \\ c = {g}^{2} + {f}^{2} - {r}^{2} \\ c = { - 25}$

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3 years ago

10. Which is the equation of a line that is perpendicular to the line represented by y=3/4x-1/2

Dmitry_Shevchenko [17]

Y = -4/3x -1/2 , perpendicular slopes are opposite reciprocals

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2 years ago

Suppose that we were going to conduct a study to determine if there is an decrease in risk of getting lung cancer based on wheth

nalin [4]

Answer: Option C

Step-by-step explanation:

In group(1), the risk is= 5/2000 x 100

= 0.25

In group(2), the risk is= 5/1000 x 100

= 0.5

The sample relative risk is= 0.25/0.5

= 0.5

So, option C is correct.

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3 years ago

Tommy has 5 jars of marbles each jar is 2/3

tatyana61 [14]

Answer:

7.5

Step-by-step explanation: First divided 5 divided by 2/3 and then you will get 7.5 can I get my brainllest

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2 years ago

Read 2 more answers

What is 4/5 x 3 1/8 in simplest form

Lesechka [4]

3 1/8 means 8 x 3 + 1 = 25/8

Step-by-step explanation:

4/5 x 25/8

= 4x25/5x 8

= 100/40

= 5/2

6 0

2 years ago