What is the opposite of the opposite of an integer?

If f ( 9 ) = 2 , f ′ ( 9 ) = - 1 , g ( 9 ) = - 9 , and g ′ ( 9 ) = 5 , what is h ′ ( 9 ) ?

A teacher runs a total of 48 city blocks in a rectangular pattern. If the width of the run is 3x and the length of the run is 5x + 4, what is the perimeter of the path the teacher runs?

What is the property of 2x32x5=2x5x32=

The product of two consecutive integers is 72. The equation x (x + 1) = 72 represents the situation, where x represents the smaller integer.

The concession stand at a football game serve 178 customers. Of those about 52% body hotdog. About how much customers bought a hotdog?

Javier and Kyle work installing windows and can earn extra money by installing doors. Last week, Javier earned $56 more than Kyle because of door installations.

840 divided by 10 to the power 3

Jack and Jill had 3 pails of water. Each trip up the hill, Jack and Jill obtained 3 more buckets of water. Which of the graphs below represents Jack and Jill's number of pails over time?

What is 3.8 as a fraction or mixed number in simplest form?

if the ratio of home fans to visiting fans is 5:2 and all 42000 seats in a stadium are filled, how many visiting fans are in attendance