Which expressions are differences of squares?

Select each correct answer.

t^2-1

n^2-225

p^2-40

k^2+81

1 4/10 greater than 1 7/12

Solve for all real numbers. |2x+5|>9 Choices: A.) (negative infinity, - 4) or (4, infinity) B.) (negative infinity, - 7) or (2, infinity) C.) (-7,2) D.) (-4,4)

What would you add to x^2-16x+___ to complete the square? a. 4 b. 8 c. 64 d. 16

Fiona kept track of how many text messages she sent each day one week, the numbers were 21,57,32,25,33,42 and 46 on average how many text messages did she send daily

A coin is flipped 4 times. what is the probability of the coin landing on tails all 4 times

If you are 29 years old, you have been alive for about 920,000,000 seconds. write this number in scientific notation.

What is 10/6as a improper fraction

Henry is considering purchasing a mountain bike he likes to brakes cost $500 and the other cost $600 he tells his dad that the bike that is where expensive is 20% more than the cost of the other bike is he correct

Molly is making a sign in the shape of a trapezoid. One base is 18 inches and the other is 30 inches. How high must she make the sign so its area is 504 square inches?

While hiking, Sanjay went up 200 meters. If Sanjay started at 500 meters above sea level, which integers represents his elevation now?