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3 years ago

Does this scatter plot show a positive trend a negative trend or no trend

Mathematics

1 answer:

maw [93]3 years ago

6 0

The dots are moving in a downward direction from left to right, so it is a negative trend.

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Mark tosses a coin 25 times. What is the probability that it lands on heads exactly seven times?

mezya [45]

Answer:

1.43%

Step-by-step explanation:

we have that we can solve it by means of binomial, in this case m = 25. Also the probability of head is 50%. we need to know when it falls 7 times, therefore x = 7

the formula is:

P (x) = mCx * p ^ x * q ^ (m-x)

we know that p is 0.5 therefore q is equal to 0.5, replacing:

P (7) = 25C7 * 0.5 ^ 7 * 0.5 ^ (25-7)

P (7) = 25! / (7! * (25-7)!) * 0.5 ^ 7 * 0.5 ^ (25-7)

P = 0.0143

that is, the probability is 1.43%

6 0

3 years ago

NEED HELP FOR EXAMS TOMORROW

alexandr1967 [171]

Answer:

also got exams

Step-by-step explanation:

good luck bro

7 0

3 years ago

Elimination method: ax+by=r, -bx+cy=s

Alex17521 [72]

$\left[\begin{array}{ccc}ax+by=r\\\\-bx+cy=s\end{array}\right]$

Isolate x for $ax+by=r$

$x= \frac{r-by}{a} ; a \neq 0$

Subsititute $x= \frac{r-by}{a}$

$-b \frac{r-by}{a} +cy=s$

Isolate r for : $-b \frac{r-by}{a}+cy=s$

$r=- \frac{as-acy-b^2y}{b} ; a \neq 0;b \neq 0$

For x : $\frac{r-by}{a}$

Subsititute r = $- \frac{as-acy-b^2y}{b}$

$x= -\frac{as-acy-b^2y}{b}/a$

$x = \frac{cy-s}{b}$

The solutions to the system of equations are:

$r= -\frac{as-acy-b^2y}{b}$ and <span> $x = \frac{cy-s}{b}$
</span>
hope this helps!

3 0

3 years ago

A line of fit might be defined as

OleMash [197]

A line through a scatter plot of data points that best expresses the relationship between those points.

7 0

3 years ago

The ratio of green pepper plants to red pepper plants in Adelins garden is 3 to 5. If there are 20 red peppers plants, how many

Anon25 [30]

Answer:I think is 5.

Step-by-step explanation:

5 0

4 years ago

Does this scatter plot show a positive trend a negative trend or no trend​

Does this scatter plot show a positive trend a negative trend or no trend