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3 years ago

Explanation please...........

Mathematics

2 answers:

mina [271]3 years ago

8 0

Answer:

my school

Step-by-step explanation:

block me from sieng the image

Tamiku [17]3 years ago

4 0

Answer:

answer: Hi = 15

Step-by-step explanation:

the larger shape is the same as the smaller shape just flipped over and bigger of course so to find this out you have to take 2 simular angles and find out what multiplied by the small angle will get the big angle so I see angles gh and ba are simular I try 4.5 ÷ 1.5 = 3 so 3 is how much the shape is being multiplied by so bc is simular to hi so I do 5 x 3 = 15 and theres are answer 15 is the length of hi hope this helps you!

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First two two terms of the given number sequence 3n + 1 are...

PtichkaEL [24]

Answer:

the sequence begins as {4, 7, ... }

Step-by-step explanation:

a(n) = 3n + 1

The first term is a(1) = 3(1) + 1 = 4, and

the second term is a(s) = 3(2) + 1 = 7

So the sequence begins as {4, 7, ... }

5 0

2 years ago

1. What is the mean to the nearest tenth?

Inessa [10]

Solution: 1. The mean is given below:

$Mean=\frac{\sum fx}{\sum f}$

Where:

$f$ is the frequency

$x$ is the value

$\therefore Mean=\frac{1 \times 7 + 2 \times 1+ 3 \times 3 + 4 \times 2 + 5\times 2}{15}$

$=\frac{7+2+9+8+10}{15} =\frac{36}{15} =2.4$

Therefore, the mean = 2.4

2. The mean is given below:

$Mean = \frac{8+11+23+15}{4}$

$=\frac{57}{4}$

$=14.3$

I am not understanding why your teacher 14.3 is wrong. Please check whether the weight of 4 pumpkins is correct or not.

3. We are given that on average 5 passengers will board the bus at each of the 6 stops.

Let x be the number of passengers board the bus at the sixth stop.

Therefore, the average is:

$\frac{3+7+5+6+2+x}{6} =5$

$23+x=30$

$x=30-23$

$x=7$

Therefore, 7 passengers need to board the bus at the sixth stop for Leah's prediction to be true.

6 0

3 years ago

Kevin and Michelle traveled together by car and shared the driving. Kevin drove for 3.25 hours, then Michelle drove for 1.5 hour

jek_recluse [69]

Using the relation of velocity, distance and time, it is found that 35 represents Michelle's velocity.

-----------------------------

Velocity is <u>distance divided by time</u>, then:

$v = \frac{d}{t}$

Kevin drove for 3.25 hours, thus $t_1 = 3.25$ . The distance drove by Kevin is:

$d_1 = v_1t_1$

$d_1 = 3.25v_1$

Michelle drove for 1.5 hours, thus $t_2 = 1.5$ . The distance drove by Michelle is:

$d_2 = v_2t_2$

$d_2 = 1.5v_2$

The total distance is:

$d = d_1 + d_2$

$d = 3.25v_1 + 1.5v_2$

Comparing to the expression:

$3.25v_1 + 1.5v_2 = 3.25(42) + 1.5(35)$

We get that 42 is Kevin's speed and 35 is Michelle's speed.

A similar problem is given at brainly.com/question/24316569

8 0

3 years ago

Find the particular solution of the differential equation \frac{dy}{dx} + y\cos(x) = 5\cos(x)

Assoli18 [71]

$\dfrac{\mathrm dy}{\mathrm dx}+y\cos x=5\cos x$
$e^{\sin x}\dfrac{\mathrm dy}{\mathrm dx}+y\cos xe^{\sin x}=5\cos xe^{\sin x}$
$\dfrac{\mathrm d}{\mathrm dx}\left[e^{\sin x}y\right]=5\cos xe^{\sin x}$
$e^{\sin x}y=5\displaystyle\int\cos xe^{\sin x}\,\mathrm dx$
$e^{\sin x}y=5e^{\sin x}+C$
$y=5+Ce^{-\sin x}$

4 0

3 years ago

A genetic experiment with peas resulted in one sample of offspring that consisted of 438 green peas and 173 yellow peas.

Andre45 [30]

Answer:

The 95% confidence interval is $0.2474 < p < 0.3188$

The result obtained does not contradict expectation

Step-by-step explanation:

From the question we are told that

The number of green peas is k = 438

The number of yellow peas is u = 173

Generally the sample size is mathematically represented as

$n = k + u$

=> $n = 438 + 173$

=> $n = 611$

Generally the sample proportion for yellow peas is

$\^ p = \frac{u}{n}$

=> $\^ p = \frac{173}{611 }$

=> $\^ p = 0.2831$

From the question we are told the confidence level is 95% , hence the level of significance is

$\alpha = (100 - 95 ) \%$

=> $\alpha = 0.05$

Generally from the normal distribution table the critical value of $\frac{\alpha }{2}$ is

$Z_{\frac{\alpha }{2} } = 1.96$

Generally the margin of error is mathematically represented as

$E = Z_{\frac{\alpha }{2} } * \sqrt{\frac{\^ p (1- \^ p)}{n} }$

=> $E = 1.96 * \sqrt{\frac{ 0.2831 (1- 0.2831)}{611} }$

=> $E = 0.0357$

Generally 95% confidence interval is mathematically represented as

$\^ p -E < p < \^ p +E$

=> $0.2831 -0.0357$

=> $0.2474 < p < 0.3188$

From the question we are told that it was expected that 25% of the offspring peas will be yellow

Now from the 95% confidence interval obtained we see that the expected sample proportion(25% ) falls within it so it means that the result obtained does not contradict expectation

7 0

3 years ago