The rectangle below was enlarged using a scale factor. What is the area of the original rectangle? 8 cm2
20 cm2
25 cm2
40 cm2

The mean of a set of data is -3.82 and its standard deviation is 2.31. find the z score for a value of 3.99.

1. evaluate 8x(2)y9(-2) for x=-1 and y=2 2. simplify the equation. -() 3. simplify the expression. [tex]\frac{5}{x(-2) y9(5)}[/tex]

Jonathan can type 20 documents in 40 minutes ,and susan can type it in 30 minutes and jack can type it in 24 minutes working together ,how much time will it is take them type the same document