–0.2(14 – 6x) = –7x – (–3 – 9x)

Can anyone solve ?

Find the cosine function that is represented in the graph.

Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least “c.” using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least “c”?

Ineed to find the answer to number 2