Simplify the expression.

1) -n + 9n + 3 - 8 8n

2) 6a - b - 2a + 4b

3) 18 - 3c + 9 + 4d

4) 3 - 4x + 5y + 6x - 12y

5) -21x - 2x(second power) + 16x(second power)

3, 12, 48, 384, 1536, 6144, 24576, 98304

step-by-step explanation:

just keep timing it by 4.

let x be the money she spent so that she can earn the free t-shirt.

since, she already spent $112.49

⇒

also, as per the statement: jennifer must spend $250 or more in order to qualify for a free t-shirt at the store.

then,

we have an inequality i.,e

subtract 112.49 from both sides we get;

therefore, $137. 51 more money does jennifer need to spend so that she can earn the free t-shirt