Find the 14th term of the geometric sequence 10, 20, 40, ...

81920

Step-by-step explanation:

10 20 40 80 160 320 640 1280 2560 ... 81920

81,920

Step-by-step explanation:

10 (1st)

10 * 2 = 20 (2nd)

20 * 2 = 40 (3rd)

40 * 2 = 80 (4th)

80 * 2 = 160 (5th)

160 * 2 = 320 (6th)

320 * 2 = 640 (7th)

640 * 2 = 1,280 (8th)

1,280 * 2 = 2,560 (9th)

2,560 * 2 = 5,120 (10th)

5,120 * 2 = 10,240 (11th)

10,240 * 2 = 20,480 (12th)

20,480 * 2 = 40,960 (13th)

40,960 * 2 = 81,920 (14th)

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.