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3 years ago

Please help asap 20pts

Mathematics

2 answers:

Studentka2010 [4]3 years ago

6 0

The answer to your question is,

B. Commutative Property

-Mabel <3

Shkiper50 [21]3 years ago

5 0

Hi,

Answer:

Commutative property

The reason thats the answer is because cumunative propety is the reverse of wwhat was written before that. For Example, 2 x 3 = 3 x 2!

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I need help with this asap

ddd [48]

Answer:

SAS

Step-by-step explanation:

Becaus it is rectangle when we see it at the diagonal

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2 years ago

According to a study, 68% of all males between the ages of 18 and 24 live at home. (Unmarried college students living in a d

Marat540 [252]

Answer:

a) P(X≥143)=0

b) This contradicts the study as getting a sample with this proportion is almost impossible (if the proportion of 68% is true).

Step-by-step explanation:

If we use the normal approximation to the binomial distribution we have the following parameters (mean and standard deviation):

$\mu=np=0.68*206=140.1\\\\ \sigma=\sqrt{np(1-p)}=\sqrt{206*0.68*0.32}=\sqrt{44.8256}=6.7$

Then, we can calculate the probability of X being equal or more than 143 using the z-score:

$z=\dfrac{X-\mu}{\sigma/\sqrt{n}}=\dfrac{143-140.1}{6.7/\sqrt{206}}=\dfrac{2.9}{0.4668}=6.2124\\\\\\P(x\geq143)=P(z>6.2124)=0$

This contradicts the study as getting a sample with this proportion is almost impossible (if the proportion of 68% is true).

6 0

3 years ago

I have a test on these type of questions and don't know what to do....

3241004551 [841]

Answer:

You take the info and answer the questions with guidance from the tables

Step-by-step explanation:

4 0

2 years ago

Pam had $135.62 in her bank account. She deposited $58.90. How much money she have in her bank account now?

Novosadov [1.4K]

Answer:

$76.72

(135.62-58.90=76.72)

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3 years ago

How many solutions does this linear system have? y = y equals StartFraction 2 over 3 EndFraction x plus 2.x+ 2 6x – 4y = –10

Ira Lisetskai [31]

Answer:

The system has one solution

Step-by-step explanation:

we have the system of equations

$y=\frac{2}{3}x+2$ ----> equation A

$6x-4y=-10$ ----> equation B

Solve the system by substitution

substitute equation A in equation B

$6x-4(\frac{2}{3}x+2)=-10$

$6x-\frac{8}{3}x-8=-10$

Solve for x

Multiply by 3 both sides to remove the fraction

$18x-8x-24=-30$

Combine like terms

$10x=-30+24$

$10x=-6$

$x=-\frac{6}{10}$

Simplify

$x=-\frac{3}{5}$

<em>Find the value of y</em>

$y=\frac{2}{3}(-\frac{3}{5})+2$

$y=-\frac{6}{15}+2$

$y=\frac{24}{15}$

Simplify

$y=\frac{8}{5}$

The solution of the system is the point $(-\frac{3}{5},\frac{8}{5})$

therefore

The system has one solution

4 0

3 years ago

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