Name each figure in triangle BDF a. an angle bisector -
b. a median -
c. a perpendicular bisector -
d. an altitude -

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

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%)

In a rectangle klmn, km = 6x + 16 and ln = 49. find the value of x