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4 years ago

Why do we use variables and what's the significance of using a variable ?

Mathematics

2 answers:

AlladinOne [14]4 years ago

6 0

<span>a variablle is the unknows amount</span>

taurus [48]4 years ago

6 0

A variable is a letter that represents any number. Therefore, variables are often used to represent unknown numbers.

In algebra, variables are used very often to put as place holders until we find out what that number is. It's important to understand that variables can be different numbers in each problem.

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My grade is a 77%, if i get a 0% on a paper worth 30% of my grade, what will my grade be now??

blsea [12.9K]

$Grade=Paper+Other$
$Grade=(Grade_{paper}\times Value_{paper})+(Grade_{other}\times Value_{other})$
$Grade=(0 \times 30\%)+(77\% \times (1-30\%))$
$Grade=(0 \times 30\%)+(77\% \times 70\%)$
$Grade=0+53.9\%$
$Grade=53.9\%$

6 0

4 years ago

2w(-6W - 1)<br> What is the answer?

gayaneshka [121]

Using the distributive property, we have -12w^2-2w since a(b+c)=ab+ac

Hope this helped

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4 years ago

18. One way to show that a statement is NOT a good definition is to find a _____

sergiy2304 [10]

Answer:

Counterexample

Step-by-step explanation:

Counterexample ensures that you are stating your point or opinion and you firmly oppose their general opinion.

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3 years ago

Farmers Jay, Peter and Sam own rectangular farms, as indicated in the figure. Jay owns 2 acres of land, Peter owns 4 acres and S

12345 [234]

Answer:

bifhgfgfhhghg

Step-by-step explanation:

3 0

3 years ago

YOU HAVE TO KNOW FOR SURE THE ANSWER. (: 15 points?!

elena55 [62]

Answer:

Step-by-step explanation:

Percent means "per hundred" or "out of one hundred." While B) is out of one hundred, turn it into a percent, and the percentage would be .95%. A) and C) are not out of 100, so those answers are not applicable. The only answer left is D), which is correct, because 95/100 is equivalent to 95%.

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4 years ago