Help me with my ixl please

Answer:

The conditions for calculating a confident surgery were clearly not past.

Step-by-step explanation:

When you are testing a vaccine of a surgery, there needs to be a over 60% success rate at which the vaccine of the surgery is affective, otherwise, it is decided that that medical procedure of medicine isn't safe. There have been some exceptions in the past when a vaccine for example was used with a 40% success rate, only because the public required this vaccine in there time.

Answer:

v = 72 km/h

Step-by-step explanation:

Given that,

The distance covered by the Patrick, d = 288 km

Time taken, t = 4 hours

We need to find the average speed of Patrick. We know that the average speed of an object is equal to the total distance covered divided by total time taken. Let it is v. So,

[tex]v=\dfrac{d}{t}\\\\v=\dfrac{288\ km}{4\ h}\\\\v=72\ km/h[/tex]

So, his average speed is equal to 72 km/h.

Given:

Number of students who has a cat and a dog = 5

Number of students who has a cat but do not have a dog = 11

Number of students who has a dog but do not have a cat = 3

Number of students who neither have a cat nor a dog = 2

To find:

The probability that a student has a cat given that they do not have a dog.

Solution:

Let the following events:

A = Student has a cat

B = Do not have a dog

Total number of outcomes is:

[tex]5+3+11+2=21[/tex]

The probability that a student has a cat but do not have a dog is:

[tex]P(A\cap B)=\dfrac{11}{21}[/tex]

The probability that a student do not have a dog is:

[tex]P(B)=\dfrac{11+2}{21}[/tex]

[tex]P(B)=\dfrac{13}{21}[/tex]

The conditional probability is:

[tex]P\left(\dfrac{A}{B}\right)=\dfrac{P(A\cap B)}{P(B)}[/tex]

[tex]P\left(\dfrac{A}{B}\right)=\dfrac{\dfrac{11}{21}}{\dfrac{13}{21}}[/tex]

[tex]P\left(\dfrac{A}{B}\right)=\dfrac{11}{13}[/tex]

Therefore, the probability that a student has a cat given that they do not have a dog is [tex]\dfrac{11}{13}[/tex].

Answer:

1/2

Step-by-step explanation:

If you have two possible outcomes then the chance you will get heads is 1/2.

Have a wonderful day! :)

Answer:

the answer is D. the center of a circle

Answer:

1496.79 mm squared

Step-by-step explanation:

Have a good day :)

Answer:

Solution given;

perimeter of triangle=20+20+24=64mm

height of triangle =16mm

length of rectangle=23mm

breadth of rectangle=24mm

we have

Total surface area=perimeter of triangle *length + 2*area of rectangle

=64*23+2*23*24=2576mm²

Surface area=2576mm²

Answer:

Hello! answer: b = 99

Step-by-step explanation:

To find b we just have to add 83 + 16 so

83 + 16 = 99 and 99 - 16 = 83 So B = 99

Answer:

B=99

Step-by-step explanation:

in our school school we were told that if a number is on the other side of the equals and it is - when you take it to the other side it will be addition so that is what I've just done hope you understand and if it was addition when we take it to the other side it would be subtraction.

Answer:

a. k = 27

b. k = 216

c. k = 0.216

Step-by-step explanation:

The value of the scale factor can be given by the following formula:

[tex]k = \frac{Final\ Volume}{Initial\ Volume}[/tex]

where,

Initial Volume = 8 cubic units

a.

Final Volume = 216 cubic units

Therefore,

[tex]k = \frac{216\ cubic\ units}{8\ cubic\ units}[/tex]

k = 27

b.

Final Volume = 1 cubic units

Therefore,

[tex]k = \frac{216\ cubic\ units}{1\ cubic\ units}[/tex]

k = 216

c.

Final Volume = 1000 cubic units

Therefore,

[tex]k = \frac{216\ cubic\ units}{1000\ cubic\ units}[/tex]

k = 0.216

Answer: 177.4999849 , or 56.5pi

Step-by-step explanation:

You simply divide the diameter by 2 to get the radius (28.25) and then plug into the circumference equation, 2*pi*r = Circumfrence.

Answer:

177.5 inches

Step-by-step explanation:

c = 2πr

d = r2

56.5/2=28.25

28.25x3.14= 88.705

88.705x2=177.41

Round, and you’ll get 177.5.

Answer:

2500

Step-by-step explanation:

Answer:

w=87

Step-by-step explanation:

4x+7=5x-13

7=x-13

x=20

Answer

answer: 1 + 1 = 2 LOLLLLLL

Answer:

70 and 110

Step-by-step explanation:

2x + 3x + 5 = 180

5x = 175

x = 35

2x -- 70

3x + 5 -- 110

Thenks and mark me brainliest :)

Answer:

It would be:

4 5/9 x 1/2

4 5/9 x 10/10

4 5/9 x 6

Step-by-step explanation:

Answer:

V=75.4 m^3

Step-by-step explanation:

V=pi*r^2*h

V=pi*2^2*6

V=4*6*pi

V=24*pi

V=75.39 or 75.4 m^3

Answer: D

Step-by-step explanation:

Answer:

D. The last line plot

Step-by-step explanation:

It's easier to line up the heights in order.

[tex]4\frac{1}{2}, 4\frac{3}{4}, 5, 5\frac{1}{4}, 6\frac{1}{2}, 6\frac{3}{4}[/tex]

Then one-by-one, plot each of the heights to the line plot.

Answer:

Step-by-step explanation:

It's Non-proportional because the graph does not

pass through the origin.

[tex]-------------[/tex]

hope it helps...

have a great day!!

Answer:

n = 13

Step-by-step explanation:

20= -6+2n

Add 6 to each side

20+6= -6+6+2n

26 = 2n

Divide each side by 2

26/2 = 2n/2

13 =n

Answer:

B(3)

Step-by-step explanation:

reorder 1,2,3,4,5

middle number is 3

Answer:

32

Step-by-step explanation:

that just is the answer use pyth theorem them add 8

20, 23,24,27,29,21,22,44,41,33, 12

Step-by-step explanation:

46

Step-by-step explanation: it means no solution

hope it is helpful to you

Answer:

This equation has no solutions

Step-by-step explanation:

3(s+4)=s+10+2s

Distribute

3s+12=s+10+2s

Add like terms

3s+12= 3s+10

Subtract 3s from both sides

0  + 12=10

This equation has no solutions

Answer:

y = -3/2x + 3

Step-by-step explanation:

y = -3/2x + 3

Answer:

95/9

Step-by-step explanation:

It will be easier for us to make the mixed numbers fractions.

2 1/3 = 7/3

8 2/9 = 74/9

now we want them to have the same denominator so we multiply the 7/3 fraction by 3/3.

21/9 + 74/9 = 95/9

Answer: 3 years

Step-by-step explanation:

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