Which expressions are equivalent to the one below? check all that apply. 21^x/3^x

A. (21-3) ^x

B. 7

C. 7^x

D. (21/3) ^x

E. 7^x*3^x/3^x

F. 3^x

Weather: the highest and lowest recorded temperatures for the state of texas are 120 degrees fahrenheit and negative 23 degrees fahrenheit. find the difference in these extreme temperatures

Write 13/3 as a mixed number

A cell phone service provider charges customers a fixed rental charge and a call charge based on the number of call minutes. The customers enjoy free text messaging and Internet usage.

The term y has an understood of 1.

A street sign is 87 inches tall. How tall is it in feet and inches?

What is the percent change from 70 to 56

Which rational number is equivalent to 3.27 repeating? A. 327/990 B. 27/99 C. 47/11 D. 3 27/10 E. 3 27/100

Which of the following is a regular polygon?

The sloping side of a cone is 10cm and the height is 8cm. find the radius of the base

Two companies make batteries for cell phone manufacturers. One company claims a mean life span of 2.5 years, while the other company claims a mean life span of 3 years (assuming average use of minutes/month for the cell phone).