All categories

3 years ago

Multiply: (3x)(x4 + 5)

Mathematics

2 answers:

Paul [167]3 years ago

7 0

Answer:

(3x) (X 4+5)

3x×(x×4+5)

3x×(4x+5)

12x^2+15x answer

Lelu [443]3 years ago

3 0

Answer:

12x² + 15x

Step-by-step explanation:

(3x × 4x) + ( 3x × 15)

You might be interested in

the average temperature at the south pole is -49.62and the average temperature at north pole is -34.68. how much higher is the a

Alecsey [184]

-34.68 - (-49.62) = -34.68 + 49.62 = 14.94 degrees warmer at the north pole

7 0

3 years ago

for the data values below construct a 95 confidence interval if the sample mean is known to be 12898 and the standard deviation

Volgvan

Answer:

A 95% confidence interval for the population mean is [3315.13, 22480.87] .

Step-by-step explanation:

We are given that for quality control purposes, we collect a sample of 200 items and find 24 defective items.

Firstly, the pivotal quantity for finding the confidence interval for the population mean is given by;

P.Q. = $\frac{\bar X-\mu}{\frac{s}{\sqrt{n} } }$ ~ $t_n_-_1$

where, $\bar X$ = sample proportion of defective items = 12,898

s = sample standard deviation = 7,719

n = sample size = 5

$\mu$ = population mean

Here for constructing a 95% confidence interval we have used a One-sample t-test statistics as we don't know about population standard deviation.

So, 95% confidence interval for the population mean, $\mu$ is ;

P(-2.776 < $t_4$ < 2.776) = 0.95 {As the critical value of t at 4 degrees of

freedom are -2.776 & 2.776 with P = 2.5%}

P(-2.776 < $\frac{\bar X-\mu}{\frac{s}{\sqrt{n} } }$ < 2.776) = 0.95

P( $-2.776 \times {\frac{s}{\sqrt{n} } }$ < ${\bar X-\mu}$ < $2.776 \times {\frac{s}{\sqrt{n} } }$ ) = 0.95

P( $\bar X-2.776 \times {\frac{s}{\sqrt{n} } }$ < $\mu$ < $\bar X+2.776 \times {\frac{s}{\sqrt{n} } }$ ) = 0.95

95% confidence interval for $\mu$ = [ $\bar X-2.776 \times {\frac{s}{\sqrt{n} } }$ , $\bar X+2.776 \times {\frac{s}{\sqrt{n} } }$ ]

= [ $12,898-2.776 \times {\frac{7,719}{\sqrt{5} } }$ , $12,898+2.776 \times {\frac{7,719}{\sqrt{5} } }$ ]

= [3315.13, 22480.87]

Therefore, a 95% confidence interval for the population mean is [3315.13, 22480.87] .

5 0

4 years ago

which of tthe following fucngions describes the average expense fir a player played, in terms of x, the number of games played?

Firdavs [7]

And we are waiting to see the functions listed?

4 0

4 years ago

What is 1 plus 1 divided by 10?

baherus [9]

Answer:

0.2

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

What's the slope of 1/2

jekas [21]

A slope of 1/2 means that for every two units you go to the right horizontally, the graphed line
goes up 1 unit vertically.

3 0

3 years ago