Nine times the sum of a number and 2 is 189. i need to make it to an equation.

Select a graph that have an equation with a < 0

Indicate the formula for the following conditions: p^c(n,r)=

Astudent must have an average on five test that is greater than it equal to 80% but less than 90% to receive a final grade of b. devon's greades on the first four test were 78% 62% 91% and 80% what range if grades on the fifth test would give him a b in the course? ( assuming the highest grade is 100%)