Question

17. Reciprocal of is?
18. 20% of 2500 is?
19. a3 x a? is?
20. Regular polygons have equal
-- and equal​

Answer 1

Answer:

18_ 20/100×2500

20×25

500

Answer 2

Answer:

18. 500

19. ${a}^{4}$

20. sides, angles.

Step-by-step explanation:

17. Question is incomplete. So I can't answer it. Sorry.

18. 2500 - 100%

? - 20% (Cross multiplication)

$\frac{2500 \times 20}{100} = 500$

19. ${a}^{3} \times a \: = {a}^{3 + 1 } = {a}^{4}$

20. Regular polygons have equal sides and equal angles.