Hello there!

Explanation:
↓↓↓↓↓↓↓↓↓↓
First you had to add by 7 from both sides of the equation.

Simplify it should be the correct answer.

<u><em>Answer⇒⇒⇒⇒⇒⇒w=18</em></u>
Hope this helps!
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-Charlie
Answer:
We know that the total area under the normal curve is 100%. According to the empirical rule of Normal distribution:
Approximately, 68% of data lies within
standard deviations of mean.
Approximately, 95% of data lies within
standard deviations of mean.
Approximately, 99.7% of data lies with
standard deviations of mean,
Therefore, in a normal curve, roughly 95% of all cases fall within plus or minus two standard deviations.
C is incorrect. 8f represents the cost of 8 formulas, not just the cost of one formula.
Answer:
Step-by-step explanation:
In school i did these but i have no clue how to do them.I will try though:)