Find the value of c such that each expression is a perfect-square trinomial.
show steps on all you!
1. x^2-16x+c
2. p^2-14p+c
3. b^2+18b+c
4. n^2-n+c

Which unit of measure would be the most appropriate to measure the capacity of a bottle of nail polish? a.fluid ounces b.cups c.pints d.quarts e.gallons

Will give brainliest what is the value of x? enter your answer in the box.

The jewelry store is having a sale. necklaces that were regularly priced at $23.50 are on sale for $18.80. what is the percentage of decrease in the price of necklaces?