Mathematics, 10.07.2019 15:30, nyraimccall408

Jeanie sells m& ms out of her giant bag at 4 for 5 cents. the machine at the store sells you 9 for 25 cents. which is the better deal for you? show your work. justify your answers in the space below tom sells baseball cards at 10 for 35 cents. is that a better deal than 12 for 40 cents? prove your thinking. the hardware store sells sparklers for the 4th of july. they charge 19 cents a piece. the fireworks stand charges 85 cents for four. which is the better deal? how can you tell? frosted flakes has 11 grams of sugar in each 1 ounce serving. raisin bran has 13 grams of sugar in each 1.4 ounce serving. which one has less sugar from an ounce of cereal? how can you tell for sure? prove your answer.

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Okay for problem 1 heres my explanation
So if you can get 4 bags for 5 cents so I multiplied 5 by 5 to get 25 cents and multiplied 4 by 5 and got 20 for 25 cents but the machine sells you 9 for 25 cents so if you get the m&ms from Jeanie you'll get more for your money if you get it from jeanie
Now problem 2
Now if tom sells 10 cards for 35 cents so theres a 5 cent difference for 2 more cards now 3 cents will be the most likley for the price for one of toms cards and toms price should have been 33 cents so your only being robbed of 2 cents not a big amount but we'll still look at the other guy 12 cards for 40 cents now if we look at how much toms cards will be if you bought 12 is only 39 cents 1 cent less than the other guy so in conclusion if you buy from Tom you get the better buy
Now problem 3
simple mutipily 19x4 and 76 cents the guys at the firework stands charge 85 for four so if you go to the hardware store and buy your fireworks there you get a better deal.
okay so im running out of time so someone else is gonna answer the last problem... sorry m8

answered: grumpygreengori

Jeanie sells M&Ms out of her giant bag at 4 for 5 cents.

Each piece of M&Ms cost = $\frac{5}{4}=1.25$ cents

The machine at the store sells you 9 for 25 cents.

Each piece costs = $\frac{25}{9}=2.78$ cents

Hence, Janine is selling at a lower price. Hers is a better deal.

Tom sells baseball cards at 10 for 35 cents.

Per card costs = $\frac{35}{10}=3.5$ cents

The second deal is 12 for 40 cents.

Per card costs = $\frac{40}{12}=3.33$ cents

Hence, 2 for 40 cents is a better deal.

The hardware store sells sparklers for the 4th of July. They charge 19 cents a piece.

The fireworks stand charges 85 cents for four.

Per piece cost = $\frac{85}{4}=21.25$ cents cents

Hence, The hardware store's deal is a better deal.

Frosted flakes has 11 grams of sugar in each 1 ounce serving.

Raisin Bran has 13 grams of sugar in each 1.4 ounce serving.

Per ounce sugar content in Raisin Bran= $\frac{13}{1.4}=9.28$ gram

Hence, Raisin Bran has less sugar from an ounce of cereal.

answered: Guest

step-by-step explanation:

30% of $420 is 0.30($420) = $126 and $420 + $126 = $546.

or, 130% of $420 is 1.3($420) = $546.

notice that this is not the $600 original list price with which we started.

why doesn't this work?

the method does not work because 30% of $420 is not the same amount as the 30% of $600. it may seem obvious when stated this way, but it is a very common error made on problems of this type. we cannot just use the same percent and get back to the original amount because we are taking that percent of a different value.

to work problems of this type correctly, it is generally best to write an equation for the situation and then solve.

example: since (100% – 30%)(original price) = (sale price)

70% of the (original price) is $420.

0.7x = 420

equation image indicator

x = 600

the original cost was $600.

we may also solve this problem using the two-step method. working the problem in two steps requires us to use more algebra skills. we have to know that x = 1x (identity property of multiplicationtext annotation indicator) and that 1x – 0.3x = 0.7x (subtracting like terms). then we solve the problem as follows:

(original price) – 30%(original price) = sale price

x – 0.3x = 420

0.7x = $420

equation image indicator

x = 600

the original cost was $600.

note that with both of the above methods we do obtain the correct original amount.

example: after a 5% pay raise, hermione is earning $22,680 per year. what was she earning before the pay raise?

105% of (original salary) = current salary

1.05x = 22,680

equation image indicator

x = 21,600