Jen earned x dollars on saturday and y dollars on sunday. she plans to save 25% of the money she earned over the weekend and spend the rest. write an expression for the amount of money jen saves. a. 0.25x+y b. 25(x+y) c. x+y d. 0.25(x+y)

The linear combination method is applied to a system of equations as shown. 4(.25x + .5y = 3.75) → x + 2y = 15 (4x – 8y = 12) → x – 2y = 3 2x = 18 what is the solution of the system of equations? (1,2) (3,9) (5,5) (9,3)

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”?

Line wx is parallel to line yz. if m