What is the next number in this pattern

21

Step-by-step explanation:

8+13=21

as 3+5= 8 ; 5+8=13

21

Step-by-step explanation:

You add the number prior to the number on the pattern. So you add 3 to 5 and get 8. You add 8 to 5 to get 13 and then you add 13 to 8 to get 21. It also shows that 21 is correct since 21 + 13 is equal to 34. Which 34 is the next number in the sequence after the blank space.

This also follows the pattern in 55 and 89.

Hope this helps! Let me know if you need any more help on this question.

8(-10x+3.5y-7)

8×-10x + 8×3.5y + 8×-7

-80x + 28y - 56

therefore

-80x+28y-56 is the correct answer

$30.32

step-by-step explanation:

65.00*.12=2.80

65.00-2.80=57.20

57.20*1.06=60.632

60.632/2=30.316