Help, homework is due tomorrow, it belongs to my nephew

#1:  3t + -6,     #2:  0.2y + 0.2(2) = 0.2y + 0.4

Might help to understand why expanding works.

Multiplication is just repeated addition. 4 x 3 is the same as saying 4 + 4 + 4. So when we say 3(t - 2), we're really saying

(t - 2) + (t - 2) + (t - 2).

And if you remove the parentheses and rearrange it, you get

t - 2 + t - 2 + t - 2

t + t + t - 2 - 2 - 2

(t + t + t) + (-2 + -2 + -2)

3t + 3(-2).

Does that make sense? Drawing a picture can help too:

Anyway so for #1 we have 3(t - 2), which equals 3(t) + 3(-2), which is 3t + -6.

For #2 we have 0.2(y + 2)  =  0.2y + 0.2(2)  =  0.2y + 0.4.

hi,

3. 12.15, you are correct.

4.2.01, your first digit is correct,

hope this !

d

step-by-step explanation: