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2 years ago

ECA is a semi equilateral triangle at C,

Mathematics

1 answer:

stiks02 [169]2 years ago

6 0

Answer: its 50

Step-by-step explanation:

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Problem: In good weather, tomato seeds can grow into plants and bear ripe fruit in as few as 19 weeks. Lorna planted her seeds 1

KatRina [158]

Answer:

the answer is w=19-11=8

Step-by-step explanation:

19-11=8

5 0

3 years ago

Do you think it would be difficult to convert between the English Customary System and the Metric System? For example, if I want

tester [92]

Answer:

1 pound is 453.6 grams appox

Step-by-step explanation:

to calculate how many grams is 2 pounds, u can do 2x453.6 which would be 907.2

for all others i have an attached file :)

7 0

3 years ago

In a binomial experiment with 45 trials, the probability of more than 25 success can be approximated by What is the probability

Pani-rosa [81]

Answer:

0.6 is the probability of success of a single trial of the experiment

Complete Problem Statement:

In a binomial experiment with 45 trials, the probability of more than 25 successes can be approximated by $P(Z>\frac{(25-27)}{3.29})$

What is the probability of success of a single trial of this experiment?

Options:

0.07
0.56
0.79
0.6

Step-by-step explanation:

So to solve this, we need to use the binomial distribution. When using an approximation of a binomially distributed variable through normal distribution , we get:

$\mu =\frac{np}{\sigma}$ = $\sqrt{np(1-p)}$

now,

$Z=\frac{X-\mu}{\sigma}$

so,

by comparing with $P(Z>\frac{(25-27)}{3.29})$ , we get:

μ=np=27

$\sigma=\sqrt{np(1-p)}$ =3.29

put np=27

we get:

$\sigma=\sqrt{27(1-p)}$ =3.29

take square on both sides:

10.8241=27-27p

27p=27-10.8241

p=0.6

Which is the probability of success of a single trial of the experiment

5 0

3 years ago

During one term Rachel took 2 mathematics test her mean score was 75 she scored 12 points more on the first test then the second

MaRussiya [10]

Answer: she scored 69 points on the second test.

Step-by-step explanation:

Let x represent the number of points that she scored in the first test.

Let y represent the number of points that she scored in the second test.

If her mean score was 75, it means that

(x + y)/2 = 75

x + y = 75 × 2

x + y = 150- - - - - - - - - 1

If she scored 12 points more on the first test than the second test, it means that

x = y + 12

Substituting x = y + 12 into equation 1, it becomes

y + 12 + y = 150

2y + 12 = 150

2y = 150 - 12

2y = 138

y = 138/2

y = 69

3 0

3 years ago

this week you read 57 pages. this is seven more than two times the number of pages read last week. write an equation and solve.

spayn [35]

57 = 7 + 2x
50 = 2x
x = 25

x being the number of pages read last week

Hope this helps a little!!

7 0

3 years ago