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Amiraneli [1.4K]
3 years ago
8

Elements vs. compounds which substance is a compound or an element ​

Mathematics
1 answer:
zaharov [31]3 years ago
3 0

Answer:

A pure substance that is made up of ONE type of atom is known as an element. So, an element would be any pure substance that is made up of a single type of atom.

A compound is the chemical combination of two or more atoms in a fixed proportion. So, a substance that is made up of two or more atoms that have chemically combined is known as a compound.

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A billboard is 27 feet high and casts a 36-foot shadow at noon. At the same time, a fir tree next to the billboard casts a 48-fo
Archy [21]

Proportion can be used to find the height = 0.75

Step-by-step explanation:

A billboard is 27 feet high and casts a 36-foot shadow at noon.

Height of billboard = 27 feet

Height of shadow of billboard = 36 feet

\frac{\texttt{Height of billboard}}{\texttt{Height of shadow of billboard}}=\frac{27}{36}\\\\\frac{\texttt{Height of billboard}}{\texttt{Height of shadow of billboard}}=\frac{3}{4}=0.75

A fir tree next to the billboard casts a 48-foot shadow.

Height of shadow of fir tree  = 48 foot

\texttt{Height of shadow of fir tree, H = }\frac{\texttt{Height of billboard}}{\texttt{Height of shadow of billboard}}\times 48

Proportion can be used to find the height = 0.75

5 0
2 years ago
What is the quotient of 3 divided 1/6<br>​
Bess [88]

Answer:

To find the quotient of 3 divided by 1/6 you must multiply by the reciprocal of the fraction, in this case it is 6.

So you would rewrite it as,

3*6=18

So your answer is multiply 3 by 6.

P.S * represents multiplication.

Step-by-step explanation:

5 0
3 years ago
What is the perimeter of rectangle with vertices located at (- 3, - 1), (5, - 1), (5, 9) and (- 3, 9) on the coordinate ?
xxMikexx [17]

Answer:

32 units^2

Step-by-step explanation:

Finding the width and the length:

One side = √[(-1 - (-1)^2 + (5 - (-3))^2]

= √(0 +  64)

= 8.

The adjacent side = √(9-9)^2 + (-3-5)^2

= 8.

Perimeter - 4 *8 = 32 units^2.

3 0
3 years ago
Maggie sells homemade cookies. on a dozen cookies she spend 0.50 on flour, 0.70 on sugar, 0.40 on eggs,and 0.40 on packaging if
Art [367]

Using the profit concept, it is found that she makes a profit of $4 selling a dozen cookies for six dollars.

<h3>What is a profit?</h3>


The profit is given by the <u>subtraction of the revenue by the total costs</u>.

In this problem:

  • For the dozen cookies, she earned a revenue of 6 dollars.
  • In all, the total cost of the 12 cookies was of 0.5 + 0.7 + 0.4 + 0.4 = 2 dollars.

6 - 2 = 4, hence she makes a profit of $4.

More can be learned about the profit concept at brainly.com/question/4001746

5 0
2 years ago
Find the vertex of the function f(x) = x2 - 8x + 15.
defon

Answer: (4, -1)

Step-by-step explanation: You have to rewrite in vertex form and use the form to find the vertex

7 0
3 years ago
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