What is the rate of change in the price of the washer- and dryer pair between week 1 and week 5?

A. -11.45/week
This is because if you calculate the change between each week you get the numbers: 11.7, -77, 5.5, 14. I put it in a mean calculator and got the mean of -11.45. Therefore, A is the answer.

One shot. if 60% of 10 is 6, then what is 70%? we know it would be seven (since 60% is mathematically 60/100, or 6/10, then 70% is 70/100, or 7/10) but we can check anyway using ratios: 6 : 60% = x : 70%*inverse multiplicationx * 60% = 6 * 70%*divide both sides by 60%x = (6 * 70%) / 60%x = 7and since he has made 6 shots already, he would need just one more to get 7 shots or 70%. if the explanation is too confusing, comment and i will try to