Question

Can I get some help I think I did this wrong and I guessed :/

Answer 1

Very true, guessing does not help in math.

2t-(1/2)(-4t)=2t+2t=4t

-8 -(1/2)(9)+5/2 =-8-(4.5)+2.5=-10
So the final answer is
4t-10

Answer 2

You'll want to first simplify the expression
`(2t-8)- (1)/(2) (9-4t)+ (5)/(2)}`.

To do that, first distribute the
`- (1)/(2)`:


`(2t-8)- (1)/(2) (9-4t)+ (5)/(2)}`

`2t-8- (9)/(2) +2x+ (5)/(2)`

From there, you may just combine like terms:


`2t-8- (9)/(2) +2t+ (5)/(2)`

`4t-8- (9)/(2) + (5)/(2)`

`4t-8- (4)/(2)`

`4t-8-2`

`4t-10`

Answer:
D. 4t - 10