2 years ago

How I can answer this question, NO LINKS, if you answer correctly I will give u brainliest!

Mathematics

2 answers:

Yuliya22 [10]2 years ago

8 0

Answer:

$7.4 \times {10}^{ - 8} - 6.7 \times {10}^{ - 9} \\ = (7.4 - 6.7) {10}^{ - 8 + ( - 9)} \\ = 0.7 \times {10}^{-17}$

tino4ka555 [31]2 years ago

3 0

Answer:

6.73E-8 I think

Step-by-step explanation:

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Step-by-step explanation:

Given,

Worth of $5 and $10 bills = $675

Let,

Number of $5 bills = x

Number of $10 bills = y

According to given statement;

5x+10y=675 Eqn 1

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y=2x Eqn 2

Putting value of y from Eqn 2 in Eqn 1

$5x+10(2x)=675\\5x+20x=675\\25x=675$

Dividing both sides by 25

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Putting x=27 in Eqn 2

$y=2(27)\\y=54$

Caitlin has 27 $5 bills and 54 $10 bills.

Keywords: linear equation, substitution method

Learn more about substitution method at:

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