Complete the following tasks for this equation: = -2.15. Give an estimate for the solution. Be sure to explain how you arrived at the estimate, either by showing an equation or in words.
Solve the equation. Show or explain your work.
Compared to your estimate, is your answer reasonable? Explain your answer in complete sentences.

ANSWER 1: The estimate for 2.15 is 2. (If you are rounding to the ones.)

ANSWER 2: The estimate for 2.15 is 2.2. (If you are rounding to the tenths.)

Step-by-step explanation:

ANSWER 1: I know this because the one in 2.15 is lower than 5 so the 2 would stay the same. Then the 5 and 1 would turn to a 0.

ANSWER 2: I know this because the 5 in 2.15 is higher than 4 so the 1 would turn to a higher number which would be 2.

Hopefully I explained it well and I did it right because I haven’t rounded decimals in a while.

So sorry if I did it wrong.

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: