Elena used math facts as an anchor to find the sum of 5 and
7. her work is shown.
in which step did her first error occur?
step 1: the phrase "sum of means addition,
step 2: 5 + 5 = 10
step 3: since 7 is 2 more than 5, 2 more need to be added to
10.
step 4: therefore, 5+ 7 = 8.
step 1
step 2
step 3
step 4

Which situation can be modeled by the inequality 5 + 10w ≥ 45? a. you start with $5 and save $10 a week until you have at least $45. b. you start with 5 baseball cards and purchase 10 cards every week until you have at most 45 cards. c. you start with 5 water bottles and purchases cases of 10 water bottles each until you have a total of 45 water bottles. d. you spend $5 plus $10 per week until you have less than $45.