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Darya [45]
2 years ago
7

In a class of 25 students, 15 of them have a cat,

Mathematics
1 answer:
igor_vitrenko [27]2 years ago
7 0

Answer: 9/25

Step-by-step explanation:

Since 3 of them have neither a cat or a dog, that means 22 (25-3) of them have a dog, a cat, or both.

16 + 15 = 31, which is 9 more than 22. That means 9 of them have both a dog and a cat.

Out of the 25 people, 9 have both a cat and dog, which means the probablity a student chosen at random has both is 9/25.

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I REALLY NEED HELP plz
cestrela7 [59]

Answer:

Day 1: 12 is 40% and 18 is 60%

Day 2: 14 is 47% and 16 is 53%

Day 3: 13 is 43% and 17 is 57%

as for the second question, the reason why it's different for each day is probability, the probability can change with literally every movement like how hard you fling it or if there's outside interference like the wind.

Step-by-step explanation:

6 0
3 years ago
9÷3,746 what's the answer? can u help?​
worty [1.4K]

Answer:

The answer is 0.00240256273

4 0
2 years ago
Need help with this please
Katarina [22]

For the first one, since she earns $17 per hour, & she tutored for 12 hrs this month, all you have to do is multiply the amount she makes per hour by the hours she’s tutored for. so 12x17=$204 so she made $204 this month. For the second one, it’d be the same thing, just multiply 19.5 by 17, which would give you 331.5.

& For the second question, all you have to do is plug in the numbers to the equation above. so it’d be 540 gallons / 1 minute multiplied by 42 since that is the time the pool needs to be filled by. So, if you do that, you will get 22,680, so the answer will be : yes it will fill up on time.

3 0
2 years ago
30 POINTS!!! PLEASE HELP ME
Ludmilka [50]

Remark

All you need is 2 points to get the line of the equation. One is itself (B and B') is the same in both triangles. Now we need to find one more point. Since this is a reflection, the midpoint between C and C' is the second point. That choice of C and C' is completely arbitrary.

Step One

y intercept of the line. That point is B which is (0,1)

Step Two

Find the midpoint between C and C'

C is (-4,-2) and C' is ( 0 , - 4) The midpoint is

C" = (x2 + x1)/2 , (y2 + y1)/2

C" = (-4 + 0 )/2 , (-2 + - 4) / 2

C" = (-4)/2 , - 6/2

C" = (-2, - 3) C" is the midpoint between C and C'

Step 3

Find the equation of the line.

y = ax + b We are trying to find A

y = ax + 1

-3 = a(-2) + 1

-3 - 1 = a(-2)

- 4 = a(-2) Divide by -2

-4/-2 = a

a = 2

The slope of the line is 2

Answer

y = 2x + 1

6 0
3 years ago
What is <br><img src="https://tex.z-dn.net/?f=5%20%7C%20-%208%7C%20%20-%20%20%7C%20-%203%20%2B%202%20%7C%20%20%2B%20%20%5Csqrt%7
Cerrena [4.2K]

Answer:

39+4i

Step-by-step explanation:

4 0
2 years ago
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