you have 20 packs of stickers. each pack has 10 stickers. you need 400 sickers for project. how many more packs of stickers do you need ?

You need 40 packs of stickers.

Step-by-step explanation:

20x10=200 stickers

Double it and you'll get 40x10=400

first option

a function is a relation in which an input is paired with exactly one output.

so, let's find the right answer.

in our first option, our inputs are january, february, and march. the outputs are 30, 28, and 25. each input has it's own output. this is correct!

our second option we know is incorrect, because ms. valverade has two outputs, dogs and cats. this is not a function.

our third option is incorrect as well. the yellow square has two ouputs, the square and the triangle.

lastly, in our fourth option, we see the number 7 two times with a different output. therefore, this is not a function.

remember: each input must be paired with only one output!

step-by-step explanation:

hans did not square the 40-unit side; he merely multiplied it by 2.   incorrect.