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3 years ago

11

I need help.... again lol.....

1 answer:

kupik [55]3 years ago

5 0

The answers you have for each of them are right

You might be interested in

What is the solution set of this inequality? 3|p + 4| + 5 < 8 (–5, –3) (–3, 0) (0, –5) (3, 5)

Viefleur [7K]

Given:

The inequality is

$3|p+4|+5$

To find:

The solution set for the given inequality.

Solution:

We have,

$3|p+4|+5$

$3|p+4|$

$3|p+4|$

Divide both sides by 3.

$|p+4|$

It can be written as

$-1$

Subtracting 4 from each side, we get

$-1-4$

$-5$

The solution set of the given inequality is (-5,-3).

Therefore, the correct option is A.

7 0

3 years ago

The latest poll from ESPN asked fans what their favorite sport was, considering pro, college and highschool levels. Out of 1000

shepuryov [24]

Answer:

Confidence interval is $0.2911$

Step-by-step explanation:

Given that 32% of fans sport is basketball as favorite sport. So total number of fans is,

$32\%\times 1000$

$= \dfrac{32}{100}\times 1000$

$=320$

So 320 fans favorite sport is basket ball.

Now find sample proportion ,

$\widehat{p}=\dfrac{number\:of\:people\:in\:the\:sample}{total\:number\:of\:people}$

Substituting the value,

$\widehat{p}=\dfrac{320}{1000}$

$\widehat{p}=0.320$

Formula for confidence interval is,

$CI=\widehat{p}\pm z\sqrt{\dfrac{\widehat{p}\left (1-\widehat{p}\right )}{n}}$

To calculate the z value.

$Confidence Level=1-\alpha$

$0.95=1-\alpha$

$0.05=\alpha$

Now divide above value by 2,

$\dfrac{0.05}{2}=\dfrac{\alpha}{2}$

$0.025=\dfrac{\alpha}{2}$

To find the value of z score calculate the area under the curve as follows

$A=\dfrac{1+CL}{2}$

$A=\dfrac{1+0.95}{2}$

$A=\dfrac{1.95}{2}$

$A=0.975$

On z table, find the value of 0.975. So the row corresponding to 0.975 is 1.9 and column corresponding to 0.975 is 0.06. Adding these two values the z score is 1.96.

or find the value from excel by using command as follows,

=NORM.S.INV(0.025)= -1.959963985

Now substituting the value,

$CI=0.320\pm 1.96\sqrt{\dfrac{0.320\left (1-0.320\right )}{1000}}$

$CI=0.320\pm 0.02891$

Lower end of the interval is,

$CI=0.320- 0.02891$

$CI=0.2911$

Upper end of the interval is,

$CI=0.320+ 0.02891$

$CI=0.3489$

Therefore 95% confidence interval is $0.2911$

7 0

3 years ago

Simplify the following expression. -7x²-2+5x+13x² - 15x

andreev551 [17]

Answer: 2(3x^2-5x-1) or 6x^2-10x-2

Step-by-step explanation: combine like terms, and then factor by grouping :)

8 0

1 year ago

I was on vacation for a month, and now I'm really behind in math. Can anyone help? Thanks~

koban [17]

X+6 = 3x - 12 (right?)
6 = 2x-12
18 = 2x
9 = x

4x-15 = 2x+3
2x-15 = 3
2x = 18
x = 9

Basically, x = 9

7 0

3 years ago

Write the equation of the line fully simplified slope-intercept form

Alexxandr [17]

Answer:

y=4x-3

Step-by-step explanation:

3 0

3 years ago