All categories

3 years ago

I need help quick. First Answer gets 30 points

Mathematics

2 answers:

Bogdan [553]3 years ago

5 0

Step-by-step explanation:

[ refer to the attached file ]

( if m angle SRQ means supplement of SRQ then , it is 180 - 142 = 38°

or what it means ? )

liberstina [14]3 years ago

3 0

Answer:

d.142

Step-by-step explanation:

if it bisects the angle, it means that both smaller angles are of the same angle degree. thus, SRQ is twice the degree of one, or 71*2=142

You might be interested in

20 PINTS PLEASE HELP!

serg [7]

The first one 2(x+1)

7 0

3 years ago

Suppose that in a large metropolitan area, 73% of all households have cable tv. Suppose you are interested in selecting a group

Darina [25.2K]

Answer:

$P(X \leq 2)=0.000387+0.00628+0.0425=0.0491$

Step-by-step explanation:

1) Previous concepts

The binomial distribution is a "DISCRETE probability distribution that summarizes the probability that a value will take one of two independent values under a given set of parameters. The assumptions for the binomial distribution are that there is only one outcome for each trial, each trial has the same probability of success, and each trial is mutually exclusive, or independent of each other".

2) Solution to the problem

Let X the random variable of interest, on this case we now that:

$X \sim Binom(n=6, p=0.73)$

The probability mass function for the Binomial distribution is given as:

$P(X)=(nCx)(p)^x (1-p)^{n-x}$

Where (nCx) means combinatory and it's given by this formula:

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

For what proportion of groups will at most two of the households have cable tv?

So we want to find this probability:

$P(X \leq 2)=P(X=0)+P(X=1)+P(X=2)$

$P(X=0)=(6C0)(0.73)^0 (1-0.73)^{6-0}=0.000387$

$P(X=1)=(6C1)(0.73)^1 (1-0.73)^{6-1}=0.00628$

$P(X=2)=(6C2)(0.73)^2 (1-0.73)^{6-2}=0.0425$

$P(X \leq 2)=0.000387+0.00628+0.0425=0.0491$

3 0

3 years ago

Ed is planning daily walking workouts on the same distance of 12 km in the morning and in the evening. Usually he is walking at

melamori03 [73]

Answer:

The morning rate is 5 km/h

Step-by-step explanation:

Let the evening time is t

∴ The morning time = total time - t

∵ Total time is 5 hours and 24 minutes = 5 + 24/60 = 5 + 2/5 = 5.4 hrs

∴ The morning time = 5.4 - t

∵ The rate = distance / time

∵ Morning distance = 12 and morning time = (5.4 - t) h

∵ Evening distance = 12 km and evening time = (t) h

∵ The morning rate = (evening rate + 1) km/h

∴ 12/(5.4 - t) = 12/(t) + 1

∴ 12/(5.4 - t) = (12 + t)/t ⇒ use cross multiplication

∴ (5.4 - t) (12 + t) = 12 × t

∴ 64.8 + 5.4t - 12t - t² = 12t

∴ 64.8 - 6.6t - t² = 12t

∴ t² + 6.6t + 12t - 64.8 = 0

∴ t² + 18.6t - 64.8 = 0

∴ (t - 3) (t + 21.6) = 0 ⇒ (t + 21.6) rejected no -ve value for time)

∴ t - 3 = 0 ⇒ t = 3 h

∵ The evening time = 3 h

∴ The morning time = 5.4 - 3 = 2.4 h

∴ The morning rate = 12/2.4 = 5 km/h

8 0

4 years ago

Read 2 more answers

vampirchik [111]

Answer:

b. postulate: if a plane contains a line, it contains the point of the line

4 0

3 years ago

What's 4(2a)+7(-4b)+(3•c•5) in standard form?

Natasha_Volkova [10]

Answer:

4(2a)+7(-4b)+(3•c•5)

8a -28b +(15*c)

Step-by-step explanation:

6 0

3 years ago