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 Can anybody help me to solve these questions?
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By: Andy (offline)  Saturday, June 25 2011 @ 10:39 PM CDT (Read 1683 times)  
Andy

Question
1. Jerry bought four times as many pencils as notebooks and spent a total of $ 21.60 . He spent $2.40 more on the notebooks than the pencils. Given that a notebook ncosts $ 3.20 more than a pencil , find the cost of a pencil.

2. Ms Lee baked 24 more chocolate muffins than banana muffins. After she gave away 1/6 of the chocolate muffins and 3/8 of the banana muffins, she was left with 35 more chocolate muffins than banana muffins . How many chocolate muffins did she bake at first ?

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By: suz855 (offline)  Monday, June 27 2011 @ 09:52 AM CDT  
suz855

1. Jerry bought four times as many pencils as notebooks and spent a total of $ 21.60 . He spent $2.40 more on the notebooks than the pencils. Given that a notebook ncosts $ 3.20 more than a pencil , find the cost of a pencil.

Pencils Notebooks Total
4u 1u [Number]
$9.60 $12 $21.60 [Value]

1u of NB ? ($21.60 + $2.40) ÷ 2 = $12
4u of Pencils cost $9.60 1u --> $2.40

12 – 2.40 = 9.60
9.60 ÷ 3.20 = 3

Each pencil cost 2.40 ÷ 3 = $0.80
Big Grin

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By: suz855 (offline)  Monday, June 27 2011 @ 09:58 AM CDT  
suz855

2. Ms Lee baked 24 more chocolate muffins than banana muffins. After she gave away 1/6 of the chocolate muffins and 3/8 of the banana muffins, she was left with 35 more chocolate muffins than banana muffins . How many chocolate muffins did she bake at first ?

Chocolate Banana
24u+24 24u [at first]
-4u-4 -9u [change]
20u+20 15u [after]

20u + 20 – 15u = 35
5u = 15
1u = 3

She baked 24x3 + 24 = 96 chocolate muffins at first.

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