Peter bought 9 packs of pencils. Each pack has 10 pencils in it. If he lost 18 pencils, how many pencils
does Peter have left?
OA. 72
OB. 171
OC. 37
OD. 108

For this case we have that if each package of pencils has 10 pencils we have:

Thus, we have a total of 90 pencils.

If Peter lost 18 pencils we have:

Thus, Peter has 72 pencils left.

After losing 18 pencils, Peter has 72 pencils left.

Option A

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!

answer: f true

step-by-step explanation: