Astudent must have at least 18 points to advance to round 2. use estimation to decide if any of the students were unable to advance to round 2. explain your thinking. remember to use complete sentences and be very specific!

30 points

All of the students advanced to Round 2.

Step-by-step explanation:

We can just add the whole numbers of their scores for each level to see if they have 18 points total.

Kim: 7 + 6 + 6 = 19

Sally: 5 + 6 + 7 = 18

Tina: 8 + 7 + 8 = 23

Zoey: 8 + 8 + 8 = 16

Looking at this information, we know that all of the students were able to advance to Round 2.

250

step-by-step explanation:

mr. flanders’ class sold 47 doughnuts and   mr. rodriquez’s class sold 38 cartons of milk

step-by-step explanation:

let x be the number of doughnuts sold by mr. flanders’ class and y be the number of cartons sold by mr. rodriquez’s class.

1. together, the classes sold 85 items, then

x+y=85.

2. both classes earn earned $104.49 for their school. if doughnuts were sold for $1.35 each, then x doughnuts costed $1.35x. if cartons of milk were sold for $1.08 each, then y cartons costed $1.08y. hence,

1.35x+1.08y=104.49.

3. solve the system of two equations: