0:02 in this video we're going to go over six
0:05 different GED math word problems in the
0:07 first example we're ordering coffee online
0:08 online
0:11 one company charges 15 bucks per bag
0:14 plus five dollars shipping the other one
0:17 uses this equation to find the cost and
0:19 N represents the number of bags
0:22 what's the difference if you order five bags
0:23 bags
0:25 so that's no problem we'll just start
0:27 with the first company beanco and we'll
0:30 do fifteen dollars times we're ordering
0:33 five bags and then plus the five dollar shipping
0:34 shipping
0:36 so we pay 80 for beanco
0:39 and then for fast Brew we're just going
0:41 to change n the number of bags to five
0:44 so we're going to put a five right there
0:48 so let's do 18 and then times five plus eight
0:50 eight
0:52 that'll give us 98.
0:54 and then finally we want to find the
0:56 difference between them so that just
0:58 always means subtract so we'll do the
1:02 bigger one minus the smaller one 18 that
1:09 this equation here represents the price
1:12 of Amala that has B beads what is the
1:15 number 0.27 mean in this equation
1:18 because the whole thing's the price were
1:21 initially paying 15 dollars plus 0.27
1:23 times the number of beads that we have
1:26 in other words the price is going to go
1:28 up that amount for every bead that we buy
1:29 buy
1:32 therefore that is the price per bead and
1:34 that's it
1:36 and you could test it because Amala has
1:39 108 beads so you could do 108 times that
1:42 plus 15 and that'll give you the total
1:47 Monique saved 980 to buy a new phone for
1:51 7.75 if her phone bill is 35 dollars per
1:53 month how many full months can Monique
1:56 pay for her bill with her savings
1:58 now let's go ahead and start with her total
1:59 total
2:01 and then subtract out the cost of the phone
2:02 phone
2:05 so that leaves her with 205
2:07 then we want to find out how many months
2:10 she can pay her bill and that's 35 bucks
2:12 divide by that
2:14 and that'll give us this however we
2:17 can't actually afford six months we can
2:20 only afford five so therefore that's our
2:22 final answer there
2:25 you put a can of soda in a mini fridge
2:28 the initial temperature is 67 degrees
2:30 if the temperature drops six degrees
2:33 every hour which expression represents
2:36 the temperature after T hours
2:38 now one way to do this is just to change
2:41 T to one so what would the temperature
2:43 be after one hour
2:45 well every time you have a six t next to
2:47 each other it's just going to be six
2:49 times one so it's going to be six so
2:51 let's see what happens
2:55 okay this one gives us 6 minus 67 that
2:56 would make it a negative temperature
2:58 after an hour that wouldn't make sense
3:01 so that's out the next one would be 6
3:04 plus 67 well that would make it 73
3:06 degrees that would warm it up so that's
3:08 no good
3:12 the third one 67 minus six Bingo because
3:15 that'll get us down to 61 degrees it's
3:17 dropping the temperature and that's what
3:18 we want there
3:20 and then that last one once again
3:22 that'll add six so that'll make it 73
3:25 degrees no good that'll warm it up so
3:28 that's it there you could always try to
3:30 plug in a value for the letter and see
3:35 the chance it will rain each day this
3:37 week is 60 percent
3:39 what's the probability that it'll rain
3:42 four days in a row now to set this up
3:44 let's just put four spots for the four
3:47 days but we know every day the
3:49 probability that it'll rain is 60
3:52 percent so let's put that in those spots
3:54 but if you want multiple things to
3:56 happen you're always going to use
3:59 multiplication for probability here
4:01 so therefore you could just type this
4:03 into the calculator
4:05 but another way to do it when you're
4:07 multiplying multiple things is to do it
4:10 to the power four and that's equivalent
4:12 to this we just don't have to type as
4:14 much so let's see what that looks like
4:15 let's clear
4:19 we'll do 0.60 then you use the up arrow
4:21 to the power of four
4:23 bada boom we get that
4:25 now when you're converting it from a
4:28 percent to a decimal or vice versa just
4:30 move the decimal two places to the right
4:34 so it's going to be 12.96 percent or
4:37 it's about 13 percent so we'll call it
4:43 a blueprint uses a scale of half an inch
4:45 is equal to 20 feet
4:47 how many inches tall is a building
4:50 that's actually 88 feet
4:52 whenever you're scaling things down or
4:55 up you could always set up a proportion
4:57 and the way you could start it is you
4:58 could stack the two things that you're
5:00 given in the beginning on the left side there
5:02 there
5:03 then we want to find out where do we put
5:07 88 feet on the other side but Feet's on
5:09 the bottom so we'll put feet on the
5:10 bottom there
5:12 and that's the thing we're looking for
5:14 once you have this set up you'll always
5:18 multiply the things diagonally and then
5:20 divide by what's left over
5:22 so let's check that out
5:25 okay we'll do 88 and then multiply by
5:28 the thing diagonally 0.5
5:32 and then divide by what's left over 20.
5:35 and that'll give us 2.2 so that's how
5:43 and one last one we have a laptop it's
5:46 850 but it's on sale for 10 percent off
5:48 we also have a coupon for an additional
5:51 five percent off what's the price that
5:52 we'll pay
5:54 if you're taking ten percent off then
5:56 you're really just paying ninety percent
5:58 and you could always think of it like
6:01 money when you say per cent just think
6:04 of it as cents so it's 90 cents there
6:06 okay so that's the amount that we're
6:09 going to pay of the 850. so we're going
6:11 to multiply those two
6:15 that'll give us 765. but from here we're
6:17 then going to take an additional five
6:18 percent off
6:21 but five percent out of a hundred we're
6:23 gonna pay 95 percent
6:26 and then multiplying those two that'll
6:27 give us our final
6:31 726 75 so that's it there
6:33 let me know what other word problems you
6:35 would like me to cover in the next video here
6:36 here
6:39 hope these were helpful for you we'll
6:40 see in the next video toodles
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