The temperature of a city changed by −15 degrees celsius over a 5-week period. the temperature changed by the same amount each week.
write an expression to show the average change in the temperature of the city each week. simplify the expression and explain, using words, what your answer means

(-15) / 5  

(-15) / 5 = -3 This means that each week the average change in temperature was -3 degrees Celsius.

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: