Casey correctly wrote and solved a system of linear equations by substitution. In his work, he substituted an expression for one variable and solved for the other. This resulted in the equation 5 = 20. What can Casey conclude?

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?

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).

Simplify the following expression: 5x-6y+5z-x-12y+2z