Suppose a variable x is normally distributed with a standard deviation of 10. given that 30.85% of the values of x are greater than 70, what is the mean of x?

the five memebers of the traynor family each buy train tickets. During the train ride, each family memeber buys boxed lucnch for for 6.50. If the total cost of the trip is 248.50, what is the price of the train ticket

A professor at a local community college noted that the grades of his students were normally distributed with a mean of 74 and a standard deviation of 10. the professor has informed us that 6.3 percent of his students received a's while only 2.

If we toss 3 coins, what is the probability that no tails will appear?

7. log (x+3) (2x + 3) + log (x+3) (x + 5) = 2

Which types of lines match these equations? 3x + 2y = - 5 -2x + 3y = - 5

I have done a math equation for school and i forgot if i could leave a inproper fraction as my answer or if its a fraction i can reduce should i or should i not

Enter the value of n so that the expression (-y + 5) + (7y - 9) is equivalent to (ny - 4)

The heavyweight weight class in high school wrestling is from no less than 195lb and a maximum 285 LB write two inequalities to represent this range

A shose box measures 15in. by 7in. by 4 an half

Write the equation or inequality : in order to take honors level math, Lisa must have an average of 85 on her math tests. Her scores so far are 85, 70, and 98. What is the minimum score Lisa needs on the fourth test to get into honors math class?