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3 years ago

12

Will mark brainliest and will give 15 points!!!!

1 answer:

Lerok [7]3 years ago

8 0

Answer:

There is 1 way to vote for 0 people. There are 8 ways to vote for 1 person. There are 8⋅7/ 2 ways to vote for 2 people. There are 8⋅7⋅6 /2⋅3 ways to vote for 3 people. There are 8⋅7⋅6⋅5/ 2⋅3⋅4 ways to vote for 4 people. This is all because you can choose people but there are ways you can order the people.

Does this help

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Once a commercial plane reaches the desired altitude, the pilot often travels at a cruising speed. On average, the cruising spee

NemiM [27]

Answer:

4960 miles

Step-by-step explanation:

7 0

2 years ago

Find the value of x.<br> 20<br> Х<br> 16<br> 24

faust18 [17]

Answer:

It has no value whatsoever, anyhoo, E does.

5 0

2 years ago

A district-wide test is used to measure math attitude in freshmen in high school students, with a mean of 78 and a standard devi

fiasKO [112]

Answer:

Step-by-step explanation:

Given that

Population mean $\mu=78$

std deviation $\sigma =12$ = 12

sample size n =36

Sample mean = $\bar x = 85$

$H_0: \bar x = 85\\H_a: \bar x \neq 85$

(Two tailed test)

Mean difference = 7

Std error = $\frac{\sigma}{\sqrt{n} } \\=\frac{12}{6} \\=2$

Since population std dev is known and n>30 we use Z test

Z statistic = $\frac{7}{2} =3.5\\$

p value <0.001

Since p value is <0.01, at 1% significance level, we reject H0.

There is significant difference between sample mean and population mean.

7 0

3 years ago

Consider the inequality X > - 2.5 Determine whether each value of X makes this inequality true Select ALL that apply.

Leno4ka [110]

Answer:

The correct answers are: 0.5, 3, and 10.

Basically, all numbers that are greater than -2.5 can make this inequality true.

Let me know if this helps!

6 0

3 years ago

Read 2 more answers

Simplify the expression to a polynomial in standard form: (4x+5) (x^2-3x-2) PLEASE HLEP

pickupchik [31]

Answer:

$4x^3-7x^2-23x-10$

Step-by-step explanation:

So we have the expression:

$(4x+5)(x^2-3x-2)$

Distribute. Multiply (4x+5) to each term:

$(x^2)(4x+5)+(-3x)(4x+5)+(-2)(4x+5)$

Distribute:

$=(4x^3+5x^2)+(-12x^2-15x)+(-8x-10)$

Combine like terms:

$=(4x^3)+(5x^2-12x^2)+(-15x-8x)+(-10)$

Add and simplify:

$=4x^3-7x^2-23x-10$

And this is in descending order, so it's in standard form.

7 0

3 years ago