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Sever21 [200]
3 years ago
9

A box contains 5 white and 7 black balls. Two successive drawn of 3 balls are made

Mathematics
2 answers:
Makovka662 [10]3 years ago
6 0
Option D is correct 7/968 and 5/264
cluponka [151]3 years ago
4 0

Answer:

Dear user,

Answer to your query is provided below

Option (d) is correct

Step-by-step explanation:

Explanation of your query is provided in the image attached

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Two trains leave New York at the same time heading in opposite directions. Train A travels at 4/5 the speed of train one. After
grandymaker [24]
<h3>Answer:  </h3><h3>speed of train A = 44 mph</h3>

=============================================

Work Shown:

x = speed of train A

y = speed of train B

"train A travels 4/5 the speed of train B" (I'm assuming "train one" is supposed to read "train B"). So this means x = (4/5)y

distance = rate*time

d = x*7

d = (4/5)y*7 = (28/5)y represents the distance train A travels

d = y*7 = 7y represents the distance train B travels

summing those distances will give us 693

(28/5)y + 7y = 693

5*(  (28/5)y + 7y ) = 5*693

28y + 35y = 3465

63y = 3465

y = 3465/63

y = 55

Train B's speed is 55 mph

4/5 of that is (4/5)y = (4/5)*55 = 4*11 = 44 mph

Train A's speed is 44 mph

8 0
3 years ago
If: 5x + 14 = −7 ,Then: 5x + 14 − 14 = −7 − 14 This is an example of using...
Triss [41]
C. The Additive Inverse
7 0
3 years ago
St
PIT_PIT [208]
B : 4% of 780 is 31.20
4 0
3 years ago
Simplify this expression: 13 + (–12) – (–5) = ?<br> A. 6<br> B. –6<br> C. –30<br> D. 30
Anuta_ua [19.1K]
13 + (-12) - (-5)

13 - 12 + 5

1 + 5

= 6.

Answer is A)
3 0
3 years ago
Read 2 more answers
Hiii please help i’ll give brainliest if you give a correct answer tysm!
taurus [48]
20 people






Reason - following the sequence
8 0
3 years ago
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