Iam completely lost
3. three girls are preparing information packets about an upcoming fundraiser event.
• nicole prepared 270 packets in 45 min.
• hillary prepared 450 packets in 1.5 h.
• mckenzie prepared 280 packets in 1 h and 10 min.
(a) who works the fastest? explain how you solved this problem.
(b) each girl worked another 2 h at her same rate. who made the most packets that day? explain how you solved this problem.

International calls require the use of a country code. many country codes a 3-digit numbers. country codes do not begin with a 0 or 1. there are no restrictions on the second and third digits. how many different 3-digit country codes are possible?

Girardo is using the model below to solve the equation . girardo uses the following steps: step 1 add 4 negative x-tiles to both sides step 2 add 1 negative unit tile to both sides step 3 the solution is which step could be adjusted so that gerardo's final step results in a positive x-value? in step 1, he should have added 4 positive x-tiles to both sides. in step 1, he should have added 3 negative x-tiles to both sides. in step 2, he should have added 4 negative unit tiles to both sides. in step 2, he should have added 1 positive unit tile to both sides.

Rob filled 5 fewer plastic boxes with football cards than basketball cards. he filled 11 boxes with basketball cards.