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2 years ago

Could you help me with this page

Mathematics

1 answer:

NeTakaya2 years ago

8 0

5. area 0.75*2*0.75*2=2.25 m²

scale 1 in.=2 m so

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Simplify the expression 5 + 2 ×[(2+2)×5+5]

Ivan

5 + 2 * [(2 + 2)*5+5] =

5 + 2 * (4 * 5 + 5) =

5 + 2 * 25 =

5 + 50=

8 0

3 years ago

Thirty students are eating lunch at 5 tables. Each table has the same number of students. How many students are sitting at each

kaheart [24]

30 ÷ 5
6 students at each table

Hope this helps!

5 0

2 years ago

Read 2 more answers

what is the probability of seeing a sample mean for 21 observations less or equal to the sample mean that we observed

kramer

Answer:

$P(x \le 21) = 0.69146$

Step-by-step explanation:

The missing parameters are:

$n = 64$ --- population

$\mu = 20$ --- population mean

$\sigma = 16$ -- population standard deviation

Required

$P(x \le 21)$

First, calculate the sample standard deviation

$\sigma_x = \frac{\sigma}{\sqrt n}$

$\sigma_x = \frac{16}{\sqrt {64}}$

$\sigma_x = \frac{16}{8}$

$\sigma_x = 2$

Next, calculate the sample mean $\bar_x$

$\bar x = \mu$

So:

$\bar x = 20$

So, we have:

$\sigma_x = 2$

$\bar x = 20$

$x = 21$

Calculate the z score

$x = \frac{x - \mu}{\sigma}$

$x = \frac{21 - 20}{2}$

$x = \frac{1}{2}$

$x = 0.50$

So, we have:

$P(x \le 21) = P(z \le 0.50)$

From the z table

$P(z \le 0.50) = 0.69146$

So:

$P(x \le 21) = 0.69146$

4 0

2 years ago

Simplify (2x^2y)^3 (-3xy^2)^2

solniwko [45]

Simplified it's 576x^8y^7

8 0

3 years ago

What is the value of m in the figure below? In this diagram, ΔABD ~ ΔBCD.

Kryger [21]

Answer:

Option D is the right option.

solution,

$\frac{ac}{bc} = \frac{bc}{dc} \\ or \: \frac{18}{ m} = \frac{m}{7} \\ or \: m \times \: m = 18 \times 7(cross \: multiplication) \\ or \: {m}^{2} = 126 \\ m = \sqrt{126}$

Hope this helps..

Good luck on your assignment.

Hope

6 0

2 years ago