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Sauron [17]
2 years ago
6

Please help me with 20 and 21 pleas

Mathematics
1 answer:
navik [9.2K]2 years ago
7 0

Answer:

.

Step-by-step explanation:

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Evaluate 5 + 6 · 2 – 8 ÷ 4 + 7 using the correct order of operations
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Do solve this you use PEMDAS. This stands for:
Parenthesis
Exponents
Multiplication
Division
Addition
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Because there are no parentheses or exponents in this equation, we go straight to the division.

1) 8 divided by 4 equals two so we rewrite the equation. 5+6 x 2 - 2 + 7.

2) Next in order of pemdas is multiplication. Yes I know that in pemdas multiplication does come before division but it doesn’t matter in this problem which you do first. So now we do 6 x2 =12. We then rewrite the equation 5+12-2+7.

3) lastly, addition and subtraction are grouped together and you can just do it in order of the problem. So we do 5+12=17. 17-2=15. And 15+7=22.

So the final answer is: 22
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38.15 × 4 + .125 × 380.5

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