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larisa [96]
3 years ago
5

There are 60 students in the speech contest. Yesterday, 2/3 of them gave their speeches. Today, 1/4 of the remaining students ga

ve their speeches. How many students still haven’t given their speeches?
Mathematics
2 answers:
Nutka1998 [239]3 years ago
4 0

Answer:

15

Step-by-step explanation:

60 x 2/3 = 120/3 which is 40 students that gave their speech the first day

Second day there are 20 students left to speak.

20 x 1/4 = 20/4 which is 5 students that gave their speech.

Now there are 15 students left to give their speech

Zinaida [17]3 years ago
4 0
I’m pretty sure it’s 15
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The school will have to pay $18 for 15 dozen buttons how much will the school have to pay for 50 dozen buttons
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Answer:

It will cost the school $60

Step-by-step explanation:

In order to find this, set up a proportion.

$18/15 dozen = $x/50 dozen

Now cross multiply to solve

50 * 18 = 15 * x

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60 = x

4 0
3 years ago
In a survey of a community, it was found that 85% of the people like winter season and 65% like summer season. If none of them d
KengaRu [80]

Answer:

50%

Step-by-step explanation:

Let :

Winter = W

Summer = S

P(W) = 0.85

P(S) = 0.65

Recall:

P(W u S) = p(W) + p(S) - p(W n S)

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Hence,

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6 0
3 years ago
PLEASE HELP I NEED YOUR HELP GUYS PLEASE !
Amanda [17]
Total = 16 marbles
R = 4
B = 7
G = 5

a)
P(R) = 4/17
with replacing it P(B) =  7/17
so 
P(R, then B) = 4/17 x 7/17 = 28/289

b)
P(R) = 4/17
no replacing, P(B) = 7/16
so 
P(R, then B) = 4/17 x 6/17 = 24/289

c)
The answers to parts a and b are not the same. 
Part a (28/289)  with replacing, the probability to select a red then blue is higher then part b (24/289)
4 0
4 years ago
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6(w – 2) + 2 = 2(3w - 5)
galben [10]

Answer:

Infinite Solutions

Step-by-step explanation:

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3 years ago
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Answer:6 by 9

I was stuck on thus question too for a while but then I went back and figured everything.


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3 years ago
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