A group of 47 children, with some adults, travelled by coach on a trip to a zoo. The total cost of the trip was $591.
The entrance fee was $12.35 for each adult and $8.75 for each child.

The cost of hiring the coach was $118
How many adults were there in the group?
You must show your working.

5 adults

Step-by-step explanation:

plug in all numbers and calculate

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: