Tyler has a coin collection. He keeps 12 of the coins in his box, which is 10% of the collection. How many total coins are in his collection?

120

Step-by-step explanation:

10% = 12

50% = 60

100% = 120

He has 120 coins.

Step-by-step explanation:

12/10 times by 10, so it's easier to look at.

120/100 that means that there is 120 coins.

b: |12 – x| ≤ 0.25

step-by-step explanation:      

let x be the possible lengths in inches, of the ribbons jaime cut.

we have been given that jaime is cutting strips of ribbon for a project. he tries to cut each piece to be 12 inches long, but sometimes he cuts it too long or too short by as much as 0.25 inch.  

we can represent this information in an inequality as:

by the definition of absolute value function we will get,

upon combining our inequalities we will get,

therefore, the inequality   describes all the possible lengths (x), in inches, of the ribbons jaime cut.

step-by-step explanation: