Write the expression in standard form by collecting like terms:

12( 1 - 3a) +8 (a + b)

(a.) 12a + 8b + 28

(b.) -28a + 8b + 12

(c.) 28a - 8b - 12

(d.) 16a + 8b

Aball is dropped from a height of 10m above the ground. it bounce to 90% of its previous height on each bounce. what is the approximate height that the ball bounce to the fourth bounce?

Iam at home. /: i am playing video games. translate the following statement into symbolic form.

Suppose you are choosing a 6-digit personal access code. this code is made up of 4 digits chosen from 1 to 9, followed by 2 letters chosen from a to z. any of these digits or letters can be repeated. find the total number of personal access codes that can be formed. 492,804 341,172 39,917,124 4,435,236