ok so your sister buys a pencil as .39 cents. And a notebook (1) for 1.19$. the total cost was 3.92$. how many pencils did she buy?
show work, but i don't know how.
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let p= number of pencils your sister bought.
You know she only bought 1 notebook that costs $1.19. Write this as a linear equation
total cost= cost of 1 notebook + cost of p number of pencils
$3.92 = $1.19 + 0.39p now solve by isolating the variable p. You should subtract $1.19 from both sides of you equation. Then divide both sides of the equation by 0.39. This will give you the number of pencils your sister bought at 0.39 for each one of them. You should get 7 pencils.
the answer of pencils would be 7
To solve this word problem, we need to set up an equation based on the given information.
Let's assume x represents the number of pencils she bought.
According to the problem, the cost of one pencil is $0.39, so the cost of x pencils would be 0.39x dollars.
The problem also states that she bought one notebook for $1.19.
Therefore, the total cost of the pencils and the notebook is 0.39x + 1.19 dollars.
Since the total cost is given as $3.92, we can set up the following equation:
0.39x + 1.19 = 3.92
To solve this equation, we need to isolate the variable x.
Subtract 1.19 from both sides of the equation:
0.39x = 3.92 - 1.19
0.39x = 2.73
Next, divide both sides of the equation by 0.39 to solve for x:
x = 2.73 / 0.39
x ≈ 7
Therefore, your sister bought approximately 7 pencils.