I need help please on question a

  f(n) = 2 + 2(n+1)

Step-by-step explanation:

We cannot tell from your photo exactly what Kyle's coloring is. It appears that he might have colored the top bar and the bottom bar of each figure. These bars have one more square than the figure number. There are two other squares between the bars that are not colored.

Then the number of squares in figure n will be the total of the two uncolored squares and twice the number in the bottom row. That is, the number of squares could be described as ...

  f(n) = 2 + 2(n+1)

sin3a=12/15

step-by-step explanation:

since one side was multiplied by 3 the other side must also be multiplied by 3.

mr. flanders’ class sold 47 doughnuts and   mr. rodriquez’s class sold 38 cartons of milk

step-by-step explanation:

let x be the number of doughnuts sold by mr. flanders’ class and y be the number of cartons sold by mr. rodriquez’s class.

1. together, the classes sold 85 items, then

x+y=85.

2. both classes earn earned $104.49 for their school. if doughnuts were sold for $1.35 each, then x doughnuts costed $1.35x. if cartons of milk were sold for $1.08 each, then y cartons costed $1.08y. hence,

1.35x+1.08y=104.49.

3. solve the system of two equations: