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3 years ago

Somone please help me

Mathematics

1 answer:

dexar [7]3 years ago

7 0

Oop- tuff look it up on google :)

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The diameter of a circle has endpoints (2,-6) and (-4,-16).

olga nikolaevna [1]

Answer:

$(x + 1)^{2} + (y + 11)^{2} = 34$

Step-by-step explanation:

First find the midpoint of the segment from (2, -6) to (-4, -16)

((2 - 4)/2, (-6 - 16)/2)

(-2/2, -22/2)

(-1, -11) is the midpoint and is the center of the circle

Now find the distance between the 2 given points and divide by 2 to get the radius of the circle

d = $\sqrt{(2 + 4)^{2} + (-6 + 16)^{2} }$

= $\sqrt{6^{2} + 10^{2} }$

= $\sqrt{36 + 100}$

= $\sqrt{136}$

r = $\sqrt{136}$ /2

$r^{2}$ = 136/4 = 34

Equation of circle with center at (-1, -11) and radius = $\sqrt{34}$ is

$(x + 1)^{2} + (y + 11)^{2} = 34$

3 0

3 years ago

Sarah, Fiona and David share £40 in a ratio 3:3:2. How much money does each person get?

LuckyWell [14K]

Answer:

ratio:3:3:2

total of ratio=3+3+2=8

total money=40

sara gets 5x 3/8=15

eiona gets 5x 3/8+15

david gets=5x 2/8=10

Step-by-step explanation:

5 0

2 years ago

valina [46]

I think 28fa haha s an

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3 years ago

Which choices are real numbers?

Snezhnost [94]

a and c are your answers

8 0

3 years ago

Question 4

Ilia_Sergeevich [38]

Answer:

Step-by-step explanation:

Given

See attachment for chart

Required

Number of off days

To do this, we simply calculate the expected value of the chart.

This is calculated as:

$E(x) = \sum x * f$

Where

x = days

f = chances

So, we have:

$E(x) = 0* 0.3 + 1 *0.2 + 2 * 0.25 + 3 * 0.2 + 4 * 0.02 + 5 * 0.01 + 6 * 0.01 + 7 * 0.01$

$E(x) = 1.56$

$E(x) \approx 2$

3 0

2 years ago