You can remember the three numbers to your combination lock, but you can't remember their order. How many different combinations of the three numbers will you have to try, at most?
3
9
1
6

120 combinations.

Step-by-step explanation:

try this

i did it myself and i got 4.2 (b) hope its right

step-by-step explanation:

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