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ser-zykov [4K]
3 years ago
7

Find the area of the following figure below

Mathematics
1 answer:
icang [17]3 years ago
6 0
140
explanation: ......
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This is the third time and i a really annoyed as i am having my time wasted and points
muminat

Answer: A) 20.9 ; B) 34years

Step-by-step explanation:

Given the following :

AGE (X) - - - - - - - 19 - -20 - - - 21 - - - 22 - - - 23

FREQUENCY (F) - 2 - - 3 - - - - 1 - - - - 4 - - - - 1

A)

MEAN(X) = [AGE(X) × FREQUENCY (F)] ÷ SUM OF FREQUENCY

F*X = [(19 * 2) + (20 * 3) + ( 21 * 1)+(22 * 4)+(23 * 1)]

= 38 + 60 +21 + 88 + 23 = 230

SUM OF FREQUENCY = 2 + 3 + 1 + 4 + 1= 11

MEAN(X) = 230 / 11

X = 20.9

B)

WHEN A NEW PLAYER WAS ADDED :

MEAN (X) = 22

Let age of new player = y

Sum of Ages = 19 + 19 +20 + 20 + 20 + 21 + 22 + 22 + 22 + 22 + 23 + y

Number of players = 11 + 1 = 12

Mean(x) = sum of ages / number of players

New mean (x) = 22

x = (230 + y) / 12

22 = (230 + y) / 12

Cross multiply

264 = 230 + y

y = 264 - 230

y = 34 years

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Answer:

See picture below.

Step-by-step explanation:

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In a survey, 250 adults and children were asked whether they know how to swim. The survey data are shown in the relative frequen
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Step-by-step explanation:

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In ΔDEF, the measure of ∠F=90°, FD = 75 feet, and EF = 95 feet. Find the measure of ∠D to the nearest tenth of a degree. (Plz an
meriva

Answer:

  51.7°

Step-by-step explanation:

The mnemonic SOH CAH TOA reminds you that ...

  Tan = Opposite/Adjacent

  tan(D) = EF/FD = 95/75

  D = arctan(95/75)

  ∠D ≈ 51.7°

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3 years ago
Please show all work for this <br> 7x + 3 =9x - 7
luda_lava [24]
<u>7x + 3  =  9x - 7</u>

Subtract  7x  from each side:    + 3  =  2x - 7

Add  7  to each side:       10  =  2x

Divide each side by 2 :     <em>5  =  x </em>
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