## anonymous one year ago The temperature of a city changed by −20 degrees Celsius over a 4-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.

1. anonymous

You have the total for 4 weeks and you want to know the amount for each week. What do you think, multiply, divide, add or subtract?

2. anonymous

subtract

3. anonymous

hi

4. anonymous

no, division will divide the total into separate weeks. So you need to do $-20\div4$ or $\frac{ -20 }{ 4 }$

5. anonymous

ok so that will give the avg for all 4 weeks