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wariber [46]
3 years ago
8

Find the mean from the following obtained marks of the student after constructing a frequency distribution table .

Mathematics
1 answer:
elena-14-01-66 [18.8K]3 years ago
5 0

Mean = 8

The mean is the average number in a sequence. To find the mean we can simply use the following equation

(Sum of all numbers) ÷ (Amount of numbers)

The sum of the given numbers is <em>160</em>

The amount of numbers is <em>20</em>

<em />

So the mean = 160 ÷ 20 or 8.

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A man walks at the rate of 88 paces to the minute if the average length of his paces is 0.875m, find the time take to walk 2.31k
Nataly [62]

Answer:

30 minutes

Step-by-step explanation:

Walk rate = 88 paces/ minute

Average length of pace = 0.875 m

Time taken to walk 2.31 km ;

The distance in metres :

1000 m = 1 km

2.31 km = (1000 * 2.31) = 2310 m

Recall :

Time taken = distance / speed

Distance walked in a minute = 88 * 0.875 = 77 m

Time taken = 2310 / 77

Time taken = 30 minutes

6 0
3 years ago
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cricket20 [7]
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7 0
4 years ago
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jeyben [28]

Answer:

1) A

2) A

3) B

4) D

5)A

6) D

7)  A

8) C

9) D

Step-by-step explanation:

1) -5 (-2) -6= 4

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3) x-2 =16, x = 18

4) \frac{z}{-12} =-5. Clearing, z =  60

5) x =13,4

6) 14=t-4. Clearing t = 58

7) -30=j+50, clearing j=80

8) 2.8x=-9.24, clearing x=-3-3

9) 5.8= \frac{z}{2.2}. Clearing z=12.76

4 0
3 years ago
What is the radius of a circle whose equation is x^2 + y^2 + 8x - 6y + 21 =0
sveta [45]
Hello,

x^2+y^2+8x-6y+21=0

Rewritten in the form of a standard circle equation:

(x-(-4))^2+(y-3)^2=2^2

Therefore, the circle properties are:

(a,b)=(-4,3),r=2

The radius of the circle whose equation is <span>x^2 + y^2 + 8x - 6y + 21 =0 is 2.

Faith xoxo</span>
3 0
3 years ago
Read 2 more answers
Will give BRAINIEST
mart [117]

Answer:

10 gallons 12 seconds.

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7 0
3 years ago
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