9+(-7)
What is sebastian's error?

He took 9 instead of -9 and -7 instead of only 7

Step-by-step explanation:

This will represent by -9 not only 9 in integers. Then, the movement of Sebastian is given by +7+(-9) Therefore, Sebastian's error is: He took 9 instead of -9 and -7 instead of only 7

because 1.2 isnt half of 6 duh

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