The answer is x=-3
5-x=11+x
-11 -11 First subtract 11
-6-x=x
+x +x Now add x to both sides
-6=2x
~2 ~2 Finally divide by 2
-3=x Your answer is x=-3
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Step-by-step explanation:
Answer:
The first one, "A survey..."
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Step-by-step explanation:
Answer:
The quantities used by Manuela were correct
Step-by-step explanation:
The question is
Did Manuela use the right quantities?
Let
x -----> the parts of oil
y ----> the parts of vinegar
we know that
The ratio of the parts of oil by the parts of vinegar of recipe is

Determine the relation used by Manuela

Compare with the recipe


Is true, the quantities are proportional
therefore
The quantities used by Manuela were correct
Each book weighs 0.53 pounds when you round to the hundredths . This is because each book weighs the same and the stack of five weighs 9.5 pounds. Now, you divide 5 by 9.5 you get 0.52631579… and when you round the the hundredths you get 0.53