Draw a diagram to represent each of these situations. Then write an addition expression that represents the final temperature. The temperature was 80 ℉ in Arizona and then fell 20 ℉ during the night.

The temperature was -13 ℉ in Minneapolis and then rose 9 ℉ in the morning.

The temperature was -5 ℉ in Denver and then fell 8 ℉ by the morning.

1) 80+(-20)

2) -13+9

3) -5+(8)

I don't quite know how to explain

Just think about 1) 60 is the new temperature, in order to have an addition problem we're going to have to use negative numbers. Since we had to subtract 20, in order to use addition it would be 80+(-20).

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.

answer: c.  

step-by-step explanation:

mixtures containing substances that get attracted to magnet can be separated using a magnet. we can separate iron from a mixture of sand and iron, as only iron attracts to the magnet.