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3 years ago

Why is it important to define a variable before writing an equation?

Mathematics

2 answers:

aev [14]3 years ago

8 0

So you can get a better understanding of what you're defining in your equation! you need to know what is what!

Irina-Kira [14]3 years ago

5 0

If you don't know what the variable is before you do the equation, you'll end up with an answer that doesn't make sense.<span />

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Heather wants to buy a CD that cost 18.63. How much change does she receive if she gives the cashier $100?

Veseljchak [2.6K]

Answer:

81.37

Step-by-step explanation:

100 - 18.63 = 81.37

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4 years ago

Use the distriputive property to rewrite the expression. 11 (4d+6)

amm1812

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3 years ago

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Answer:

8 hours

Step-by-step explanation:

12/2= 6
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48/6= 8
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Bonus:
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2 years ago

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Romashka-Z-Leto [24]

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Step-by-step explanation:

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3 years ago

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Lela and Pepe are playing a video game. The ratio of Lela’s game score to Pepe's score is 2 : 5. Then Lela completes a quest and

Fed [463]

Answer: Lela's original score was 16.

Step-by-step explanation:

Alright lets get started.

Suppose Lela score was L.

Suppose Pepe score was P.

The ratio of Lela’s game score to Pepe's score is $2:5$

So the equation will be

$\frac{L}{P} = \frac{2}{5}$

Cross multiplying

$5\times L=2\times P$

$P=\frac{5\times L}{2}$ .................equation 1

Then Lela completes a quest and scores 12 bonus points. The new ratio becomes $7:10$

$\frac{L+12}{P} =\frac{7}{10}$

Cross multiplying

$10(L+12)=7P$

Plugging value of P from equation 1

$10(L+12)= 7\times\frac{5L}{2}$

$20L+240=35L$

$15L=240$

$L=16$

Hence the score of Leela originally was 16. Answer

5 0

3 years ago