Point r divides `bar(ef)` in the ratio 1 : 5. if the coordinates of e and f are (4, 8) and (11, 4), respectively, what are the coordinates of r to two decimal places? choices: a. (4.66, 7.62)b. (6, 6.86)c. (5.17, 7.33)d. (9.83, 4.67)

7x+8y=-18, 4x-9y=-3 solve the system of equations

In the following diagram it is given that dec,ab || dc, ad || eb, and ad is congruent to bc. a)why isn't abc a parallelogram even though it has a pair of parallel sides and a pair of congruent sides b)explain why be must be congruent to bc. further explain what type of triangle this makes triangle abc and what it tells you about angle 1 and angle 2c) finally why must angle 3 be congruent to angle 1? further, explain why we know that angle 3 is congruent to angle 2

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)