What is the 20th term of the sequence that begins -4 8 -16 32

Our rule seems to be -2x.
Term 1; -4.
-4(-2) = 8 (term 2)
8(-2) = -16 (term 3)
-16(-2) = 32 (term 4)
32(-2) = -64 (term 5)
-64(-2) = 128 (term 6)
128(-2) = -256 (term 7)
-256(-2) = 512 (term 8)
512(-2) = -1024 (term 9)
-1024(-2) = 2048 (term 10)
2048(-2) = -4096 (term 11)
-4096(-2) = 8192 (term 12)
8192(-2) = -16384 (term 13)
-16384(-2) = 32768 (term 14)
32768(-2) = -65536 (term 15)
-65536(-2) = 131072 (term 16)
131072(-2) = -262144 (term 17)
-262144(-2) = 524,288 (term 18)
524288(-2) = -1048576 (term 19)
-1048576(-2) = 2097152 (term 20)

The 20th term is 2,097,152.

I hope this helps!

The second and fourth answer are correct

Answer: question no. 1 -a. yes, the sides are in the ratio 2 : 5.question no. 2 -b. 59°question no. 3 -c. angles x and y are remote interior angles.question no. 4 -d. 90°, 45° and 45°question no. 5 -b. mn and qrstep-by-step explanation: question no. 1 -rs : xu = 3 : 7.5 = 2 : 5rt : x? = 6.4 : 16 = 2 : 5st : u? = 6 : 15 = 2 : 5as the ratios of all sides are equivalent, the triangles must be congruent and the sides must be proportional.therefore, the answer is: a. yes, the sides are in the ratio 2 : 5.question no. 2 -in the second diagram, angle b is the only letter not shown. therefore, the number must be equivalent to angle b.if we substitute the value of angle b as being 22° in the first diagram, we can now use the angle sum of a triangle to obtain the value of angle a.angle sum of a triangle = 180°therefore: let angle a = aa + 99 + 22 = 180a = 180 - 99 - 22a = 59°therefore, the answer is: b. 59°question no. 3 -angles x and y don't share the vertex of the triangle with the exterior angle w. remote interior angles don't share a vertex of a triangle with an exterior angle. this means that angles x and y are remote interior angles.therefore, the answer is: c. angles x and y are remote interior angles.question no. 4 -the sum of all interior angles of a triangle must be equivalent to 180°.90°, 45° and 45° are the only set of angle measures that are equivalent to 180°.therefore, the answer is: d. 90°, 45° and 45°question no. 5 -the only pair of sides stated in the options which are corresponding are mn and qr.therefore, the answer is: b. mn and qr.