Select all the expressions that are equivalent to -36x + 54y - 90. -9 ( 4x - 6y - 10)

-18 ( 2x - 3y + 5)

-6( 6x + 9y - 15 )

18 (-2x + 3y - 5)

-2 ( 18x - 27y +45)

2(-18x + 54y - 90 )

One expression below in undefined, and the other expression has a well defined value. which expression is undefined and explain why it has no value. which expression is defined? what is the value of that expression and how do you know? what is a different expression using a trig inverse function that is also undefined?

Your friend swims on the school team. in his first four races, his times are 24.7, 23.5, 25.6, and 27.2 seconds. which time listed for his next race would make the range larger?

Aman is 6 feet 3 inches tall. the top of his shadow touches a fire hydrant that is 13 feet 6 inches away. what is the angle of elevation from the base of the fire hydrant to the top of the man's head?