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3 years ago

Please answer and show work.

Mathematics

2 answers:

NNADVOKAT [17]3 years ago

8 0

Answer:

2.4 hours

Step-by-step explanation:

Gala2k [10]3 years ago

3 0

6×4=24

6x+4x=24

10x=24

x=24/10

x= 2.4hours they would work together

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4x -2 + 5x +6<br> What does this equal

egoroff_w [7]

Answer:

9x+4

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

If you can’t see the bottom part it’s an 8 ..so anybody ??! Help

jolli1 [7]

Multiply both sides by the reciprocal (-8/7). You would get 40/7 or 5.71428571

8 0

3 years ago

If a dozen people get on a train, and five of them get off at the next stop, how many of those people are left on the train?

kozerog [31]

1 dozen = 12
5 get off the next stop so
12 - 5 =
7 people left on the train

7 0

4 years ago

The probability of drawing a heart from a standard deck of cards is 0.25. You record the car do you draw and return the car befo

Licemer1 [7]

Answer: C) 0.112

Step-by-step explanation:

In binomial distribution with parameters n (Total trails) and p (probability of getting success sin each trial) , the probability of getting success in x trials is given by :-

$P(X=x)=^nC_xp^x(1-p)^{n-x}$

Given : The probability of drawing a heart from a standard deck of cards is 0.25

Here , getting heart is the success.

Then p= 0.25

For n= 20

The probability that you will draw a heart seven times i.e. x= 7:

$P(X=7)=^{20}C_7(0.25)^7(1-0.25)^{20-7}$

$P(X=7)=\dfrac{20!}{7!(20-7)!}(0.25)^7(1-0.25)^{20-7}\ \ [\because\ ^nC_r=\dfrac{n!}{r!(n-r)!}]$

$=\dfrac{20\times19\times18\times17\times16\times15\times14\times13!}{7!13!}(0.25)^7(0.75)^{13}\\\\=77520(0.00006103515625)(0.0237572640181)\\\\=0.112406195476\approx0.112$

Hence, the probability that you will draw a heart seven times = 0.112

Thus , the correct answer is C) 0.112 .

8 0

3 years ago

46:34

Mashcka [7]

Answer:

The first 2

Step-by-step explanation:

First expression = -4+30-3 =23

Second expression = 8(10+4)= 112.

The others would lead to a negative number.

Remember negative times negative = positive

Negative times negative times negative = negative

4 0

3 years ago