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Amiraneli [1.4K]
3 years ago
13

When can you add or subtract equations in a system to solve the system? when do you have to multiply first? Justify your answers

with examples.
Mathematics
1 answer:
victus00 [196]3 years ago
5 0
You must always use the order of operations also known as PEMDAS meaning multiplication and division come before adding and subtracting for example when solving 2+2÷2 if not follwing PEMDAS it is 2 When you do it the correct way using PEMDAS it will be 3
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AURORKA [14]
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Find the product of (3 x 109) and (2 x 109). Write the final answer in scientific notation.
chubhunter [2.5K]

The  product of (3 x 109) and (2 x 109) in scientific notation is 6*10^9

<h3>What is scientific notation?</h3>

scientific notation can be described as the expression in the form  a x 10^b where a is a number or decimal number a is greater than or equal to one.

(3 x 109) * (2 x 109) =6*10^9

Therefore, option D is correct.

Learn more about scientific notation at:

brainly.com/question/27862246

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