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4 years ago

Which element makes up 1/400 of the human body ? Magnesium, Potassium, Sodium, or Sulfur

Mathematics

2 answers:

Flauer [41]4 years ago

8 0

Magnesium makes up 1/400 of the human body

frutty [35]4 years ago

5 0

Answer:

A. Magnesium.

Step-by-step explanation:

We are asked to find element which makes up 1/400 of the human body.

Let us convert 1/400 to percentage.

$\frac{1}{400}\times 100\%$

$\frac{1}{4}\%$

$0.25\%$

We know that amount of magnesium in human body is approximately 0.25%, therefore, Magnesium makes up 1/400 of the human body.

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Which ordered pair is the solution to the system of linear equations y = negative 7 x + 2 and y = 9 x minus 14? (negative 5, 1)

Anettt [7]

Answer:

B. $(1,-5)$

Step-by-step explanation:

We have been given a system of equations. We are asked to choose the ordered par that is the solution to the given system.

$y=-7x+2...(1)$

$y=9x-14...(2)$

To solve our given system, we will equate both equations as:

$9x-14=-7x+2$

Combine like terms:

$9x+7x-14+14=-7x+7x+2+14$

$16x=16$

$x=\frac{16}{16}=1$

Upon substituting $x=1$ in equation (1), we will get:

$y=-7(1)+2\\\\y=-7+2\\\\y=-5$

Therefore, the ordered pair $(1,-5)$ is the solution of the given system and option B is the correct choice.

7 0

3 years ago

Read 2 more answers

50 points! Mhanifa I hope you can help with these ones if you are online

krok68 [10]

Pg-2 answer = 110 degrees

8 0

3 years ago

Read 2 more answers

<img src="https://tex.z-dn.net/?f=-2%283%20-%202x%29%20%3D%20-6x%20%2B%208%28x%20%2B%202%29" id="TexFormula1" title="-2(3 - 2x)

vovikov84 [41]

Answer:

$\boxed{ \bold{ \huge{ \boxed{ \sf{x = 11}}}}}$

Step-by-step explanation:

$\sf{ - 2(3 - 2x) = - 6x + 8(x + 2)}$

Distribute -2 through the parentheses

Similarly, Distribute 8 through the parentheses

$\dashrightarrow{ \sf{ - 6 + 4x = - 6x + 8x + 16}}$

Collect like terms

$\dashrightarrow{ \sf{ - 6 + 4x = 2x + 16}}$

Move 2x to left hand side and change it's sign

Similarly, move 6 to right hand side and change it's sign

$\dashrightarrow{ \sf{4x - 2x = 16 + 6}}$

Collect like terms

$\dashrightarrow{ \sf{2x = 16 + 6}}$

Add the numbers : 16 and 6

$\dashrightarrow{ \sf{2x = 22}}$

Divide both sides by 2

$\dashrightarrow{ \sf{ \frac{2x}{2} = \frac{22}{2} }}$

Calculate

$\dashrightarrow{ \sf{x = 11}}$

Hope I helped!

Best regards! :D

5 0

3 years ago

Solve for x. A) 14.5 B) 6√3 C) 20 D) 10

Stolb23 [73]

I'm guessing it is A) 14.5 but could you please put more of the question if there is any because I would do my best to help.

8 0

4 years ago

A survey of statistics students asked the students for their favorite ice cream. The results of the

Elenna [48]

Answer:

Vanilla

Step-by-step explanation:

Let us first know the definition of modal class to find the modal class distribution.

Modal class is the class which occurs maximum number of times (or) the highest frequency in the data.

In the given data, The highest frequency occurred is 24, which is for the flavour Vanilla.

That is vanilla flavour is liked by most of the students.

So, Modal class for the given data is vanilla.

3 0

3 years ago