We usually Round off the 79.90% to 80.
What value does 80 count?

The line y = x + passes through (−3, 7) and is parallel to y = 4x − 1.

The size of a certain cell is 2.5*10^-9m. another cell is 1.5*10^3 times larger. how large is the larger cell in scientific notation?

Complete the equation of the line through (−10,3) and (−8,−8). use exact numbers.