What is the sum of the geometric series in which a1 = −5, r = 3, and an = −405? hint: r ≠ 1, where a1 is the first term and r is the common ratio. hint: image attached options: a) sn = −1,220 b) sn = 605 c) sn = −15 d) sn = −605

X-intercept=-5 y-intercept=2 the equation of the line is

Question 9 of 10 2 points suppose your sat score is 1770. you look up the average sat scores for students admitted to your preferred colleges and find the list of scores below. based on your sat score of 1770, which average score below represents the college that would be your best option? o a. 1790 o b. 2130 o c. 2210 od. 1350

The figure shows triangle def and line segment bc, which is parallel to ef: triangle def has a point b on side de and point c on side df. the line bc is parallel to the line ef. part a: is triangle def similar to triangle dbc? explain using what you know about triangle similarity. part b: which line segment on triangle dbc corresponds to line segment ef? explain your answer. part c: which angle on triangle dbc corresponds to angle f? explain your answer. asap