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3 years ago

PLS HURRY!!

Mathematics

1 answer:

just olya [345]3 years ago

6 0

Answer:

<em>B) Kara's highest speed was between 30 and 35 minutes.</em>

Step-by-step explanation:

A zero slope (horizontal line) means a stopped car with zero speed.

The higher the slope, the steeper the line, the higher the speed.

Let's look at the options.

a) The car was stopped between 10 and 15 minutes, not 20. False.

b) Between 30 and 35 min, the graph shows the steepest slope, so this statement is True.

c) False, since here slope is not steepest.

d) Between 5 and 10 minutes, the graph is a straight line, so speed was constant. False.

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A wall in the kitchen is 60 feet long

hjlf

Answer:

Yes

Step-by-step explanation:

10x5=50

50/60

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3 years ago

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find the probability exactly 3 successes in 6 trials of a binomial experiment in which the probability of success if 50%. round

Dennis_Churaev [7]

Answer:

Hence, the probability of exactly 3 successes in 6 trials of a binomial experiment round to the nearest tenth of a percent is:

31.2%

Step-by-step explanation:

The probability of getting exactly k successes in n trials is given by the probability mass function:

$P(k;n,p)=P(X=k)={\binom {n}{k}}p^{k}(1-p)^{n-k}$

Where p denotes the probability of success.

We are given that the probability of success if 50%.

i.e. $p=\dfrac{1}{2}$

also form the question we have:

k=3 and n=6.

Hence the probability of exactly 3 successes in 6 trials is:

$P(3;6,\dfrac{1}{2})=P(X=3)={\binom {6}{3}}(\dfrac{1}{2})^{3}(1-\dfrac{1}{2})^{6-3}$

$P(3;6,\dfrac{1}{2})=P(X=3)={\binom {6}{3}}(\dfrac{1}{2})^{3}(\dfrac{1}{2})^{3}$

$P(3;6,\dfrac{1}{2})=P(X=3)={\binom {6}{3}}(\dfrac{1}{2})^{6$

$\binom {6}{3}=20$

Hence,

$P(3;6,\dfrac{1}{2})=P(X=3)=20\times (\dfrac{1}{2})^6=\dfrac{5}{16$

In percentage the probability will be:

$\dfrac{5}{16}\times 100=31.25\%=31.2\%$

8 0

3 years ago

Simplify to create an equivalent expression. -2(-5n+6)+5(2-7n). Choose one answer

brilliants [131]

Answer:

-25n-2

Step-by-step explanation:

-2(-5n+6)+5(2-7n)

-(-2×5n+2×6)+(-5×7n+5×2)

4 0

3 years ago

Add the following - 4/9,7/12and - 3/8

bulgar [2K]

Answer:

Step-by-step explanation:

$- \frac{4}{9} + \frac{7}{12} + ( - \frac{ 3}{8} )$

When there is a (+) in front of an expression in parentheses, the expression remains the same:

$- \frac{4}{9} + \frac{7}{12} - \frac{3}{8}$

$\frac{ - 4 \times 8 + 7 \times 6 - 3 \times 9}{72}$

Calculate the sum of difference

$\frac{ - 32 + 42 - 27}{72}$

$\frac{10 - 27}{72}$

$- \frac{17}{72}$

Hope this helps..

Good luck on your assignment...

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3 years ago

If there are 25 questions in a test, and I got an 84% grade, how many questions did I get wrong? Please explain!

alukav5142 [94]

Answer:

4 wrong

Step-by-step explanation:

Just do .84 times 25.

.84(25)=21

That means you got 21 questions right.

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3 years ago

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