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3 years ago

Only have a few questions left please help ;-;

Mathematics

2 answers:

QveST [7]3 years ago

4 0

Answer:

Hello! answer: 100

Step-by-step explanation:

25 + 55 = 80 180 - 80 = 109 therefore the answer is 100 HOPE THAT HELPS!

Svetlanka [38]3 years ago

3 0

Answer:

Step-by-step explanation:

25 + 55 = 80 and 180 is for the total so it would be 100 degrees

80 = 100 = 180

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2.247 divided into 7 equals what

Bess [88]

I think it’s 200.000

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3 years ago

4 (2x-6)=10x-6. solve for x

Reika [66]

Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation :

4*(2*x-6)-(10*x-6)=0

2x - 6 = 2 • (x - 3)

8 • (x - 3) - (10x - 6) = 0

-2x - 18 = -2 • (x + 9)

-2 • (x + 9) = 0

Solve : -2 = 0

This equation has no solution.
A a non-zero constant never equals zero.

Solving a Single Variable Equation :
Solve : x+9 = 0

Subtract 9 from both sides of the equation :
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7 0

3 years ago

3:20pm to 8:00 pm how many hour's is that

Alex

4 hours and 40 minutes

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3 years ago

9 and 5/12 - 3 and 2/3

lana [24]

Recall to always convert the mixed fractions to "improper" fractions first,

$\bf \stackrel{mixed}{9\frac{5}{12}}\implies \cfrac{9\cdot 12+5}{12}\implies \stackrel{improper}{\cfrac{113}{12}}
\\\\\\
\stackrel{mixed}{3\frac{2}{3}}\implies \cfrac{3\cdot 3+2}{3}\implies \stackrel{improper}{\cfrac{11}{3}}\\\\
-------------------------------\\\\
\cfrac{113}{12}-\cfrac{11}{3}\impliedby \textit{clearly our LCD is 12}\implies \cfrac{113-(4)11}{12}
\\\\\\
\cfrac{113-44}{12}\implies \cfrac{69}{12}\implies 5\frac{9}{12}$

5 0

3 years ago

For each of the following binomial random variables, specify n and p. (a) A fair die is rolled 50 times. X = number of times a 5

Keith_Richards [23]

Answer:

a) $n = 50, p = \frac{1}{6}$

b) $n = 16, p = \frac{1}{100}$

c) $n = 26, p = 0.25, \mu = 6.5$

Step-by-step explanation:

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

In which $C_{n,x}$ is the number of different combinatios of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

And $p$ is the probability of X happening.

(a) A fair die is rolled 50 times. X = number of times a 5 is rolled

The die is rolled 50 times, so $n = 50$ .

Each roll can have 6 outcomes. So the probability that 5 is rolled is $p = \frac{1}{6}$

(b) A company puts a game card in each box of cereal and 1/100 of them are winners. You buy sixteen boxes of cereal, and X = number of times you win.

You buy 16 boxes of cereal, so $n = 16$ .

1 of 100 are winners. So $p = \frac{1}{100}$ .

(c) Jack likes to play computer solitaire and wins about 25% of the time. X = number of games he wins out of his next 26 games.

He plays 26 games, so $n = 26$ .

He wins 25% of the time, so $p = 0.25$

We have that $\mu = np$ . So $\mu = 26*0.25 = 6.5$

6 0

3 years ago