The table shows the cost of downloading songs from Web site.

At this rate, what is the cost per song?

Each song costs $1.07

Step-by-step explanation:

Divide the total cost by the number of songs.

3.21 ÷ 3 = 1.07

5.35 ÷ 5 = 1.07

8.56 ÷ 8 = 1.07

This means that each song costs $1.07

(Just so you know, you only have to do the division thing once to get the answer but doing it 3 times ensures that there were no careless errors and that the math was correct. Also, sometimes the question will purposely make a table that doesn't all match up to trick you and to see if you did the math for more than one.)

you are playing an adventure game on your computer. you come across a troll who won't let you pass and there is no other way to get to the other side of the river except over the bridge he is guarding.

the troll is a nerd. he takes great delight in watching people struggle with his problems. very few get them. he only gives you one chance and then he changes the puzzle. you have to solve this one.

before you are four blocks. they are numbered 11,6, -7,21.

he tells that the answer he wants is minus and between -1 and - 2. you can use +, -, ×, ÷   ( and ) as many times as you like or no times at all. you don't like the way he's looking at you, but you need to cross the bridge. what do you do?

i think it is 24,000 or 460