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Algebra I Videos 29 videos
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Description:
Algebra I Drill 3, Problem 1. If masks cost $4.40 for a 10-pack, how many masks was she able to purchase if she had a total of $70 to spend?
Transcript
- 00:03
Hope you left room for an extra helping of shmoop…
- 00:06
Before heading home from work, Martha needed to get gas for her car and then buy some masquerade masks.
- 00:11
Don’t ask.
- 00:12
She ended up purchasing 12 gallons of fuel for her car at $3.99 per gallon.
- 00:16
If masks cost $4.40 for a 10-pack… hey, it’s always nice to have extra…
Full Transcript
- 00:21
…how many masks was she able to purchase if she had a total of $70 to spend?
- 00:26
And here are the potential answers…
- 00:32
So if we quickly glance at the answers, none of them have cents – so they are all rounded up;
- 00:37
We have 12 gallons at 3.99, or 4 bucks a gallon after being rounded… or 48 bucks total spent on gas.
- 00:45
She had a total of 70 bucks to spend… which means she has 22 left.
- 00:49
So now we just have to divide 4.40 into 22 to get the number of masks she could afford
- 00:55
– and remember there are 10 to a pack.
- 00:57
So 4.40 goes into 22 five times evenly. With 10 masks in a pack, we get 50 masks
- 01:04
for the money remaining after the gas gouging.
- 01:06
Our answer is D.
- 01:08
As in, “Disguise.”
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