A random sample of 20 students yielded a mean of x 72

What is the answer out of the three?

diamong [38]

Answer:

its b my dude that was the easiest question ive ever seen.

Explanation:

hope it helps bro

8 0

3 years ago

Factor the expression into an equivalent form 12y^2-75.

elena-14-01-66 [18.8K]

Hello oddworld7836!

$\huge \boxed{\mathbb{QUESTION} \downarrow}$

Factor the expression into an equivalent form 12y² - 75.

$\large \boxed{\mathfrak{Answer \: with \: Explanation} \downarrow}$

$12 y ^ { 2 } - 75$

By observing the expression, we can see that, 3 is the only common factor in both the terms of the expression. So, take the common factor 3 out.

$12 y ^ { 2 } - 75 \\ = 3\left(4y^{2}-25\right)$

Now, look at (4y² - 25). They don't have any common factors but they appear in the form of the algebraic identity ⇨ a² - b² = (a + b) (a - b). Here,

a² = 4, a = 2 (√a² = ✓4 = 2)
b² = 25, b = 5 (√b² = ✓25 = 5)

So, the (4y² + 25) becomes...

$(4 {y}^{2} - 25) \\ = \left(2y-5\right)\left(2y+5\right)$

Now, bring the 3 (common factor) & rewrite the complete expression.

$12 y ^ { 2 } - 75 \\ = \boxed{ \boxed{ \bf \: 3\left(2y-5\right)\left(2y+5\right) }}$

We can't further simplify it. Also, remember that the simplified form of an expression is equivalent to the expression. So, 3 (2y - 5) (2y + 5) is equivalent to 12y² - 75.

__________________

Hope it'll help you!

ℓu¢αzz ッ

8 0

3 years ago

What volume would be occupied by 4.8 g of oxygen gas at 0.50 atm and 133 °c? (o: 15.999)

castortr0y [4]

The volume occupied by this oxygen gas is equal to 10.0 Liters.

Given the following data:

Mass of oxygen gas = 4.8 grams

Pressure = 0.50 atm

Temperature = 133°C to Kelvin = $273 +133=406\;K$

Molar mass of oxygen gas = $2 \times 15.999$ = 31.998 g/mol.

Scientific data:

Ideal gas constant, R = 0.0821 L⋅atm/mol⋅K

To determine the volume occupied by this oxygen gas:

First of all, we would calculate the number of moles of oxygen gas;

$Number\;of\;moles = \frac{Mass}{molar\;mass}\\\\Number\;of\;moles = \frac{4.8}{31.998 }$

Number of moles = 0.15 moles.

Now, we can determine the volume by using the ideal gas law equation;

$V = \frac{nRT}{P}$

Where;

P is the pressure.

V is the volume.

n is the number of moles of a gas.

R is the ideal gas constant.

T is the temperature.

Substituting the given parameters into the formula, we have;

$V =\frac{0.15 \times 0.0821 \times 406}{0.50} \\\\V =\frac{4.99989}{0.50}$

Volume, V = 9.9998 ≈ 10.0 Liters.

Read more on volume here: brainly.com/question/25290815

7 0

3 years ago

If mariana is doing a research project about the political boundaries of different countries in southeast asia, what type of res

Pavel [41]

It’s the first one i know because i took the test i hope this helps

7 0

3 years ago

A food worker suspects there are mice in the food establishment.

nikitadnepr [17]

Answer:

Signs include feces, bitten through packages, and a distinctive scent.Explanation:Mice are not particularly clean and can cause an unpleasant smell. A worker might notice that scent. Mice leave behind small feces pieces about the size of a grain of rice. They also chew through various materials such as boxes or packages. Workers can be on the lookout for any such signs. Of course, actually spotting a mouse is the surest method of identifying that mice are present.

4 0

3 years ago