Is x^-5 - 5x^-4 + 4x^-3 - 3x^-2 + 2x^-1 - 1 a polynomial

Corey spent 25% of his savings on a printer at Louie's Electronics. How much did Corey have in his savings account before he bought the printer?

Abdul purchased n notebooks. They were 4 dollars each. Write an equation to represent the total cost c that Abdul paid.

What is 12.5 and 10 reduced by a factor of 1/5?

The admission fee for an amusement park is $19 for adults and $9.50 for children. One weekend, 3806 people paid admission for the amusement park, and the park made $55,157.

Suppose that, in 2006, Poland produced 4.02 million bikes. The total world production that year totaled 142 million bikes.

Joseph says that there is 5/8 of a ham sandwich left and 1/2 of a turkey sandwich left what is not a pair of equivalent fraction for 5/8 and 1/2

Aspen added 14 to the product of 224 and 16. What is the sum?

the number 42,__2 rounded to the hundred place is 42300. what is the least possible sum of the two missing digits? justify your answer.

What were Greek tyrants like?

Is 4b²+40b+20 a perfect square