Measured value: 23.5 cm actual value: 25 cm. what is the percent

For f(x)=2x+3 and g(x)=x^2- 8 find (f+g) (x)

Mr. brettler is hanging up a 5-foot tall rectangular welcome sign in the gym. he has drawn a sketch on a coordinate grid. he has the lower vertices of the sign at (9, –3) and (–6, –3). where would the upper vertices be on the grid?

Find the distance from the theater to the library. leave your answer in simplest radical form if necessary. 12 √12 74 √74