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 By: Andy (offline)  Saturday, June 25 2011 @ 10:39 PM CDT (Read 1698 times)
Andy

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 ?

Newbie

Registered: 12/31/06
Posts: 3

 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

Junior

Registered: 12/31/06
Posts: 16

 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.

Junior

Registered: 12/31/06
Posts: 16

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