19. Which one of the following statements expresses a true proportion?

A. 3 : 5 = 12 : 20

B. 2 : 3 = 3 : 2

C. 42 : 7 = 6 : 2

D. 14 : 6 = 28 : 18

Boron is ten years older than his sister. In three years, he will be twice as old as she is now. How old are they now?

S the line for the equation x = 4 horizontal or vertical? What is the slope of the line?

Simplify each side of the following equation before applying the addition property. 10 - 8 = 10x - 9x + 7 x =

A company is researching mining at four different land areas using different types of equipment. The table below shows the costs of land, equipment, mining, and reclamation for the four locations: Locations Cost of land Cost of equipment Cost of

These lines are parallel. Is this statement true or false? y=-2/3x+8, y=2/3x-5

If f[6} = x ^ - 2x, find: f [6} =

How many 1/2'a are in 7

Evaluate each expression. 1) 5 - (4 - 2 - (6 - 6)) A) 8 B) 5 C) 2 D) 3 2) 1/2 - 4 (1/2 + 1) 2 A) - 9 B) 9/4 C) 17/2 D) - 17/2

Subtracting 6 from the product of 4 and a number results in the number added to 27.

2 (5x-7) + 8 simplify each of the following expressions