23) —2n- (9 - 10n)
24) 10 - 5(9n-9)
25) 9a + 10(6a – 1)
26) -9(6m – 3) + 6(1 + 4m)
27) –10(1 – 9x) + 6(x – 10)
28) 5(–2n + 4) + 2(n+3)
29) -3(10b + 10) + 5(b + 2)
30) –7(n + 3) – 8(1 + 8n)
simplify each expression.

23. 8n - 9

24. 55 - 45n

25. 69a - 10

26. -30m + 33

27. -4 + 96x

28. -8n + 26

29. -25b - 20

30. -71n - 9

Step-by-step explanation:

23. -2n - 9 + 10n

Collect like terms

= 8n - 9

24. 10 - 45n + 45

Collect like terms

= 55 - 45n

25. 9a + 60a - 10

Collect like terms

= 69a - 10

26. -54m + 27 + 6 + 24m

Collect like terms

= -30m + 33

27. -10 + 90x + 6x - 60

Collect like terms

= -4 + 96x

28. -10n + 20 + 2n + 6

Collect like terms

= -8n + 26

29. -30b - 30 + 5b + 10

Collect like terms

= -25b - 20

30. -7n - 21 - 8 - 64n

Collect like terms

= -71n - 9

a complex number is a number that can be expressed in the form a + bi, where a and b are real numbers, and i is a solution of the equation x2 = −1. because no real number satisfies this equation, i is called an imaginary number. has no real solution, since the square of a real number cannot be negative.

sup

step-by-step explanation: