5. Over the years, the scores of the first test in di↵erential equations are normally distributed with a mean score of 78 and a standard deviation of 8. If 10 students are randomly selected, what is the probability that their mean score is greater than 85?

Follow these steps using the algebra tiles to solve the equation −5x + (−2) = −2x + 4. 1. add 5 positive x-tiles to both sides and create zero pairs. 2. add 4 negative unit tiles to both sides and create zero pairs. 3. divide the unit tiles evenly among the x-tiles. x =

Stefanie is painting her bedroom. she can paint 2 1/3 square feet in 4/5 of an hour. how many square feet can she paint in one hour?

Given sin28.4=.4756, cos28.4=.8796, and tan28.4=.5407 find the cos of 61.6