Which expressions are differences of squares?

Select each correct answer.

t^2-1

n^2-225

p^2-40

k^2+81

Find the area of a rhombus with diagonals 2.7 mm and 3.2 mm.

Which of the following shows 18/12 as a mixed number and 1 7/8 as an improper fraction

Three friends were eating chocolate chip cookies after school. Nacy ate four less than two times the amount of cookies that Kate ate. Avery ate two times the amount of cookies that Nancy ate.

Your office manager has given you a budget off 30000 to replace the old computers in your office with new ones. Each new computer will cost 550$. You make a quick count that determine that 15 computers will need to be replaced.

Which description best explains the domain of (gof) (x) ? -the elements in the domain of f (x) for which g (f (x)) is defined -the elements in the domain of f (x) for which g (f (x)) is not zero -the elements in the domain of g (x) for which g (f

Mr. Sands drove 15 miles to the airport. When he was 3/5 of the way, he stopped for gasoline. How far did Mr. Sands drive before he stopped for gasoline?

Lee's turtle has a shell that is 14.12 centimeters long. Ty's turtle has a shell that is 12.14 centimeters long. Which is the best estimate of the difference A. 1 Centimeter B. 2 Centimeters C. 4 Centimeters D. 6 Centimeters

Which equation is represented by the table? x y (x, y) 0 - 1 (0, - 1) 1 4 (1, 4) 2 9 (2, 9) A. y = 5x - 1 B. y = - 3x + 3 C. y = 3x - 4 D. y = 3x + 3

Which number produces a rational number when added to 0.25? A. Pie B. 0.54732871 ... C. 0.45 D. - √15

Which store is offering the best deal A. 8 for $6 B. 10 for $10 C. 2 for $3 D¢0.8 each And why