On a test that has a normal distribution, a score of 45 falls two standard deviations above the mean, and a score of 27 falls one standard deviation below the mean. Determine the mean of this test.

Use the elimination method to find the solution to the system of equations. 2x - 3y = -9 -x + 3y = 6

Marco has $38.43 dollars in his checking account. his checking account is linked to his amazon music account so he can buy music. the songs he purchases cost $1.29. part 1: write an expression to describe the amount of money in his checking account in relationship to the number of songs he purchases. part 2: describe what the variable represents in this situation.

Four congruent circular holes with a diameter of 2 in. were punches out of a piece of paper. what is the area of the paper that is left ? use 3.14 for pi