In a normal distribution, a data value located 0.8 standard deviations below the mean has Standard Score: z =

The area of a rectangle is 15+5y square feet. which of the following expressions could be the length of the sides of the rectangle, in feet a. 5 and 3y b. 5 and 3+y c. 5 and 5+y d. 3 and 5+3y

For f(x)=2x+3 and g(x)=x^2- 8 find (f+g) (x)

Donald has x twenty-dollar bills and 11 ten-dollar bill. how much money does donald have? write your answer as an expression.